Ground Alternator Directly To Battery

The warning light should go out and the ammeter should deflect to the right, indicating the alternator is charging the battery. Failure to do so may result in injury!! Basically, the extra wiring is: 1) A black wire from the alternator to the "-" terminal of the ammeter. wire from the alternator, use an 8 GA. Amperage is volume, so if your alternator is not supplying sufficient volume to your battery pack and electrical system problems can. It is a 1 wire so I have a charge wire from alt directly to battery. One solution to the voltage drop problem is to install heavier wire. Until the 1960s, automobiles used DC dynamo generators with commutators. If the alternator wire is ran to the starter, all Mastercraft would have to do is hook up a positive battery cable to the starter, a ground to the block, and plug in the ECU. housing to the engine block. Battery not charging, alternator tests ok I dropped my alternator off at a shop for a rebuild, it took 6 weeks for me to get the all clear on it, so what do I look at next to figure out why the charging doesn't work. It’s also recommended to ground the housing of the alternator directly to the engine block or common chassis ground. If the interior and dashboard lights come on brightly but slowly start to fade, then it indicates a problem whit the alternator. Or just use 2/0 and call it good. but its a easy and fast way to check for the alternator, car should run without a battery if the alternator is fine. Rerun the test with the normal hook up and see if the voltage output from the alternator works. 3) Turn on Headlights to High Beam. before attaching. The battery voltage should increase once the engine is started, as the alternator supplies additional power (see the photo). (Possibly up to 14. In theory the alternator would charge the battery to 13. , at 800 engine RPM, the alternator will be spinning at 2,400 RPM. The solution is to regulate (limit) the charging current because the shaft torque is a function of output current. The least expensive online catalog for all your Battery Cable Lugs needs. For the easiest alternator test, simply turn on the headlights to your lawn mower or outdoor power equipment. The only wires ran were positive + red in my case 4 gauge wires between battery, solenoid and alternator and a black - negative to chassis ground. Inside the alternator, the sense circuit does have a 2. Your alternator should be capable of delivering rated output equal to the maximum acceptance rate of your house battery bank. Make sure all connections are tight and secure. The warning light should go out and the ammeter should deflect to the right, indicating the alternator is charging the battery. Click to expand In an early OEM wiring harness, the very heavy wire from battery + terminal to solenoid is green. I tried to replace the diode trio but the style of this alternator was such that it did not use the black box diodes but ones that were pressed into the housing of the alternator. • IG is the ignition input that turns on the alternator/regulator assembly. As its name implies, the 3-wire alternator has three electrical connections to it. But, I don't think that's a sufficient ground to the engine. I mocked up the alternator lead by hooking it back up to the alternator like it should be and gave it a nice loop of slack then cut it to meet the positive battery. Alternator/Generator/Dynamo -- General Discussion --. reconnect alternator wires and battery ground cable. Voltage sensing is used when you want the alternator to read voltage at some other point than the battery. This will provide you with better starts, brighter lights, and better ignition performance. After about 5 to 10 minutes of driving, I find that the voltage will drop to about 14. Neither poses an advantage over the other. I did so and the lights went away. 2 - Disconnect all wire connections from the alternator and label wires for future replacement. Some common causes of alternator problems include wear and tear, a bad battery, a lost ground and a slipping belt. If you are connecting on a positive ground system then the cable at the battery will connect to the negative battery terminal. Some form of voltage regulator is a must; else the alternator would go crazy high with the volts. Luckily, the solution is simple: you run both wires directly to the battery. Long story short, I changed battery and alternator within less than an hour and was good to go. The most common reasons for an Ignitor not to work are low voltage or a bad ground (earth). So a ran a semi permanent jumper between those two points to keep going until I can make a better repair. With the ring terminal attached,. Fine Stranded Stereo wire makes great battery cable giving the best gage wire for proper battery charge. ) Checking for voltage drop Start with a good ground, which would be the negative battery post. You should get a reading of battery voltage for each one; if not, there is a broken connection and the alternator cannot change the battery. i have a 2002 toyota camry xle. Original isolated ground alternator for CUCV M1009, M1008 and similar. Install RED Power Wire. The alternator isn’t charging the battery because of other problems on the vehicle like bad wiring connections, bad battery cables, a bad battery or a bad PCM. I ran an extra ground wire from the firewall directly to the alternator's mounting bracket just cause I'm paranoid about bad grounds. 8 volts to 14. new battery,new alternator aftermarket. The HELLA Intelligent Battery Sensor (IBS) ensures precise measurement of the battery characteristics of voltage, current and temperature. This alternator is uniquely designed and engineered to provide the finest performance and durability for your vessel. Collected the charged battery from Advance Auto Parts a couple of hours later. Zero maintenance,long lasting,and will keep your battery up with a reasonable amount of driving. Normally, there only needs to be one very solid connection from the negative terminal to the frame of the vehicle. A car battery, by definition, has a finite life and will not last forever. If the engine ground wire is damaged or the contact point of the alternator and the bracket is rusted, the ground circuit might be disrupted causing various charging problems. This article applies to the Mini Cooper (2001-2006). 1) Ensure the battery is charged to 12. 5 - Hold the alternator securely while removing the mounting bolts and spacers. Our Part No. The main function of an alternator is to generate electricity for the electrical components of the vehicle and to charge its battery. Install RED Power Wire. You could burn the ground wire out. I can build you a 6,8,12 or 24volt alternator in a Delco case. 3) If overvoltage still exists, disconnect regulator wiring plug and repeat NO LOAD. It is the job of the battery to provide the power to crank the engine and start the vehicle, however, it is the job of the alternator to make sure that the battery stays charged. The alternator does not charge? If the alternator does not charge, verify proper battery state of charge, alternator inputs, voltage regulator operation and inputs battery & ground cable condition and pulley/ belt condition. The least expensive online catalog for all your Battery Cable Lugs needs. If the alternator wire is ran to the starter, all Mastercraft would have to do is hook up a positive battery cable to the starter, a ground to the block, and plug in the ECU. The other end of the Ground Wire is fitted with a ring terminal connector. Wire size is based on 4’ battery cables. Tests the batteries on the car directly, no need to remove the battery 5. The meter should read no higher than about 0. In modern cars, the alternator is actually disabled when the battery is full and the electronics will run from the battery for a while, reducing load on the engine and improving fuel economy. Use a 5/16" bolt and bolt down the 4 gauge engine to chassis ground, make sure that it the metal around the bolt is clean & shiny. Ground Path Resistance Test. The isolators allows the batteries to charge together but isolate each battery during operation. Until the 1960s, automobiles used DC dynamo generators with commutators. The grounding point for the battery should be a chassis ground with paint and dirt removed, and be directly to bare metal. A smart voltage regulator for the alternator should control and taper off the charge to prevent this and can also be set, within limitations, to accommodate your needs. ALTERNATOR INSTALLATION INSTRUCTIONS 1 - Disconnect the ground cable from the battery. The UPS will convert the 12 volts to ac for your experiment. The circuit would have been directly from the battery positive (because that is where the positive form the alternator connects too) through your spanner to the carcass, to the engine block then to the battery negative. Clean, simple and powerful. the alternator for operation and requires only that the alternator output terminal be connected to the battery insulated (positive for a negative-ground system) terminal and that a ground path be provided between the alternator housing and the battery ground terminal. No battery = no source of voltage for the regulator to read. In the diagram above, the green wire from the regulator is shown going directly to ground. its only a $6 part, so I got a new one rather than fabricating a kludge. Choose top quality brands API, BBB Industries, Bosch, Denso, OE+, Pure Energy, Remy, TYC, WAI Global. I want the second cable to go from my starting battery switch directly to the starter. i would suggest 8AWG from a welding supplier. This connection carries the charging current from the alternator to the battery, and corresponds to the screw terminal on the back of the GM unit. • Insignificant power consumption when not charging. Vehicles older than a 1960 model may require all of the connections of the alternator, except ground, to be connected to positive and negative terminals of an external voltage regulator instead of directly to battery and ignition connectors. Both positive and negative wire runs must be included in your computation. 8 volts to 14. I did so and the lights went away. Next, put a meter across the battery. So I bought a new alternator. If the voltage reading is below 14. I replaced it with a 4 ga. • Start engine, increase to high idle (1500 RPM): The volt meter should now indicate that the alternator output voltage has increased to a range from 13. As I said, the alternator light has to be working to provide the excitation current. An internal regulator is contained within the alternator housing. When you first turn your engine on, the alternator will put out up to 15 volts. A "coach" battery powers the lights, furnace, water pump and other 12 volt devices in the coach. Normally, there only needs to be one very solid connection from the negative terminal to the frame of the vehicle. (Never remove the battery cables while the engine is running to test the alternator. Do I need to add another wire to the connector that goes to the single spade and run that to ground? I don't think the VR is grounded as in your diagram. If not using isolated ground alts or starters the best bet is to connect your DC return wires directly to the alternator case and the starter ear after both have been 100% cleaned of paint and corrosion. This listing is for positive ground configurations. Pull the ELD out and use a 600-800 ohm resistor to ground and the ECM thinks the car's current load is high (forcing C to keep the alternator in high mode). Is this possible? I have heard both sides. 75 volts at the fuel pump. The orange wire with the male connection on it goes to the generator light on the dash. There may be an additional wire in the engine harness that provides a ground connection. As good as an alternator is at replenishing your car battery; it can only recharge it to the point that it has a decent amount of life left in it and is able to accept a charge. Step #8 Reconnect the battery and make sure it is fully charged using a battery charger. One 4 gauge wire from the block where you connected the battery ground wire to the chassis ground where the battery was mounted up front. 9 depending on the voltage regulator installed on your alternator. A "coach" battery powers the lights, furnace, water pump and other 12 volt devices in the coach. According to the diagram I have the Battery wire hooked up correctly. The meter should read no higher than about 0. Put the positive lead to the wire and ground the negative lead, then have your helper turn the key to start. A little later my car was a little difficult to start but started. They efficiently utilize the energy produced by the alternators and distribute the power evenly to each battery. More recently, the voltage regulator has either been integrated into the alternator assembly or has been moved from the alternator to the powertrain control module (PCM). My old alternator did not have the terminals/posts labeld. The alternator failed. • S is used by the regulator to monitor charging voltage at the battery. Do I create a new ground by attaching a 0 gauge wire from alternator to the negative terminal of the battery? Or look for something else. Battery Isolators. The safest way to incorporate alternator charging is with a second engine alternator. A car battery, by definition, has a finite life and will not last forever. Use a 5/16" bolt and bolt down the 4 gauge engine to chassis ground, make sure that it the metal around the bolt is clean & shiny. I replaced the alternator, cleaned all ground wires, ran a ground directly from the battery to one of the alternator bolts. Our selection of battery cable is great for power, ground, starter and alternator connections, 100% copper - Made in the USA. Wire size is based on 4’ battery cables. It connects directly to the battery, usually at the battery connection on the starter solenoid, or to the ammeter, if you car has one. My main concern is that I'll blow the fuse link and be dead in the water. REV 6/03 Web Site: www. Dear Tom and Ray: To do a quick check on an alternator, I was told that you could start the car and then remove the negative battery cable. Have you tried touching a hot wire to the lose white wire with the engine running to see if it shows a charge on the gauge? I take it the heavy cable attached to the bottom of the alt. There is a crimp in there somewhere though and I can't remember if the power goes from the battery directly to the starter of if it jumps through the alternator first But the grounds. Connect this wire directly to the battery, usually on the connection on the starter solenoid. 4 - Loosen alternator mounting and tension arm bolts. If it does, there is higher than normal resistance between the battery ground terminal and the alternator ground. These alternators, like the one's we're covering here from Power Master and Tuff Stuff are internally regulated, so the power wire doesn't need to pass through a factory. The ground cable from the alternator should also be a minimum of 2 gauge cable and should be bolted directly to a chassis ground or the negative side of the. The output of the alternator is wired directly to the battery +, and the alternator case should be at ground. It is just depleted of its charge. Under normal circumstances even with a good alternator in your XJ, you can expect to see a voltage drop when you use the "high draw" accessories like the A/C or heater fan, high output H4s etc. If you have an internal regulated alternator, and the ground connection is bad, the alternator will not have an accurate voltage to regulate to. Heard both yes and no, just wanting what is better. Connect this wire directly to the battery, usually on the connection on the starter solenoid. The battery is needed to start the vehicle, which, in turn spins the alternator at sufficient speed to keep the battery charged. Alternator 2 (only with double alternators) 3. I've got some 4 gauge wire coming along with a 4 gauge ground strap. Have you tried touching a hot wire to the lose white wire with the engine running to see if it shows a charge on the gauge? I take it the heavy cable attached to the bottom of the alt. 9703 BATTERY DISCONNECT SWITCH WITH ALTERNATOR FIELD DISCONNECT INSTALLATION AND OPERATING INSTRUCTIONS For use with alternators and generators rated 6-32 V. This alternator is uniquely engi-neered to provide the finest performance and durability for your vessel. I ran an extra ground wire from the firewall directly to the alternator's mounting bracket just cause I'm paranoid about bad grounds. Others claim that running a ground cable directly to the battery negative is the way to go. Top-Notch add-ons for your Jeep! Search for: Search Recent Posts. Even a bad ground wire can be enough to cause a poor charging situation and trigger the battery light. In the wiring schematic provided by Sidecar Bob ( Thank you, Bob!) on the NGW site, the ground current takes a much more circuitous route, to the rear Left Turn signal (and connects to the green ground wires going to the rectifier). Starting Battery - this battery is designed to supply a large amount of current when needed to start the engine on a motor home or tow vehicle, and then be immediately recharged by the vehicles alternator. Upgrade your alternator wiring. My sons and I ran it all weekend but the battery would die at the end of the day (about 7 hours each day). The battery kicks-in instantly, even if needed for a tiny fraction of a second, because the battery directly parallels the alternator's output. First, any technique we use to shunt alternator whine to ground must present a low impedance at the frequency we're trying to suppress (less than 8 kilohertz typically). Run a length of No. More recently, the voltage regulator has either been integrated into the alternator assembly or has been moved from the alternator to the powertrain control module (PCM). yes, but it also runs the power steering, so you would notice if the belt had fallen off. 1-wire alternator and re-tension the drive belts. It connects directly to the battery, usually at the battery connection on the starter solenoid, or to the ammeter, if you car has one. The alternator takes the energy from the crankshaft and turns it into the electricity that is stored in the battery of your car. If the wiring checks out okay, the problem could be in the voltage regulating circuitry inside the powertrain control module. If not, suspect a defective ignition switch or a break in the wiring (or disconnected) wire between the battery and ignition switch or ignition switch and starter. connection, the alternator will not operate correctly if not connected direct to battery or directly through the ammeter. Connect directly to the tow vehicle battery positive with a solenoid battery isolator controlled by the ignition circuit. Battery insulator 4. The only parts you have to change in a Delco 10SI alternator to make it positive ground is the rectifier bridge, one screw, and adding a wire. 2v on the ground side. during cranking the voltmeter displays a reading of 878 mV technician A says that this reading indicates that the positive battery cable has to high. According to the diagram I have the Battery wire hooked up correctly. ALTERNATOR CONNECTIONS. take out the battery and you will be able to remove the power and ground screws { using a 13mm wrench and a 8mm wrench } then you can remove the two alternator bolts / screws. Connect the carbon pile tester positive lead to the B+ stud (output terminal) on the alternator. Then do your best to clean all the engine grounds. 6V / Alternator output 0V]. If you were to try and start your vehicle without an alternator,. BTw is the alternator ground the other connection beside the red sleeved one?. Disconnect the negative battery cable from the battery. The three-pin multiple plug has no earth terminal. I have mine connected to the ground side of a charge light with the positive side of the light connected to ignition hot. This could be as much as 1 volt and will cause your batteries to not fully charge. Thanks for A2A. Actually, doing really well. If either goes to ground directly, replace the alternator. 12-Volt Alternator Installation & Operation Manual Introduction Thank you for choosing a Balmarr high-output alternator. Both cables are installed in the same connector, as shown in the final video. It is easier (and generally safer) to use the chassis frame ground as sparks are hopefully far enough away from the batteries to not ignite a hydrogen explosion from a charging battery. then disconnct the ground cable and tuck it down behind the battery ~ if the engine continues to run , the alternator / generator is charging fine , go 'round and shut it off then re-connect the ground cable. Before you go running down to the parts store for a new alternator make sure to check the connections at the battery terminals and also check to see that the voltage is the same at the alternator terminal (the big fat one with the heavy wire attached) {also, read the article, dead battery}. If the engine ground wire is damaged or the contact point of the alternator and the bracket is rusted, the ground circuit might be disrupted causing various charging problems. BTw is the alternator ground the other connection beside the red sleeved one?. Checking battery voltage using a digital voltmeter: In the case of dual batteries, if one battery is notably lower than the other battery, it is probably bad. However, i always test things before just throwing parts at the issue. Question: Understanding I don’t know as much as the engineers who wrote the manual for my inverter and alternator, they both call for connections directly to the battery however I would like to connect to a bus bar located directly to the battery box (a neater and more secure connection with one connection per lug), is that acceptable?. • Simple installation—one wire to each battery bank and a ground. brass or copper. The large gauge wire from the Alternator to the starter is actually going directly to the battery positive pole. Connect the current probe to the alternator B+ output lead. There are many different reasons why your battery won't charge, and getting to the bottom of the problem can be very frustrating and time consuming. 8 volts, the battery picks up an increasing share of load current. \$\begingroup\$ When you jump a car, you are using the second car's battery to provide the necessary current to turn over the engine's starter. Ideally the B+ and B- from the alt would be the same size. Use a battery charger to charge the battery first if voltages are not adequate. 5 - Hold the alternator securely while removing the mounting bolts and spacers. If you're installing a high output alternator, larger gauge battery cables, ground straps and charging wire may also be required. new battery,new alternator aftermarket. Until further notice, only rebuilt alternators and cores are available. In the wiring schematic provided by Sidecar Bob ( Thank you, Bob!) on the NGW site, the ground current takes a much more circuitous route, to the rear Left Turn signal (and connects to the green ground wires going to the rectifier). Normally alternator replacement is a good DIY repair project, with the following caution: DISCONNECT THE BATTERY GROUND CABLE!!! A spark can fry your new alternator, explode your battery, spray battery acid all over you, etc. b+ wire checks out good. Further, it must be of lower impedance than the circuit it is attached to. as you've used the ground cable , there's no worries about sparks and dead shorts of the cable touches the frame or body. This will provide you with better starts, brighter lights, and better ignition performance. 9703 BATTERY DISCONNECT SWITCH WITH ALTERNATOR FIELD DISCONNECT INSTALLATION AND OPERATING INSTRUCTIONS For use with alternators and generators rated 6-32 V. Fuse Selection & Location. Top-Notch add-ons for your Jeep! Search for: Search Recent Posts. Tech A says that a good battery should have a voltage reading of higher than 9. 4K ohm resistor to protect it from shorts to ground, but because the circuit has no intended ground path, there is no current flow. I found many places where I could hear the alternator whine, proving that all vehicle grounds are not the same. once jumped off, the the needle gradually shows discharge till buried on the left side. For convenience remove the clutch actuator cover. It shuts down the battery when it’s about 90% discharged. The alternator is a key component in running the electrical systems in your car. If it's below that, charge the battery with a battery charger before you conduct the test. Follow me on this one. Powerline Battery Isolators allows multiple batteries to be charged from a single or dual alternator system, preventing reverse drain from either battery when the boat or automotive vehicle is not running. as you've used the ground cable , there's no worries about sparks and dead shorts of the cable touches the frame or body. Do not connect them to the factory pos junction block near the power steering pump or connect the ground anywhere but the battery. The "L" connection on the wiring harness (I can link a picture if necessary, but i am on my tablet right now at work) has no power going to it regardless of key position (this wire requires 12v switched or something like that. Because an alternator that IS charging the battery will produce 13 (up to 14. Regulator maintains alternator output voltage at pre-determined regulated setting (see Table 1 or 2 below for setpoints) as vehicle electrical loads are switched on and off. 3) Turn on Headlights to High Beam. Please see additional photos for schematic. the 3 wires come from 1. If you don’t have this or can’t find it. Confirmed that I am getting voltage to the cluster with the key on when checked against a known good ground. A voltage reading within this range means that the alternator is running efficiently enough to charge the car battery. I replaced the front battery, but the Gen 1 light still has a dim glow to it that does not go out if. Alternator (automotive) Alternators are used in modern automobiles to charge the battery and to power the electrical system when its engine is running. Since this item contains a battery it ships via ground transportation only; air shipping not available due to air regulations. The GM CS series alternator (CS 121, 130, 144) was first seen in the late 80’s. The light can come on even if your alternator belt is intact and your alternator is charging well, but your battery connections are keeping the electrical circuit from properly electrifying the car's systems. Its almost like the alternator doesnt kick on until the engine gets kicked up to 2k I have done quite a bit of research, and understand the whole "generator battery monitor" theory, and have checked ALLLL cables for good ground, good contact, and checked the mega fuse mounted to the firewall. If the measurement was as noted, with the alternator at 14 Volts, then don't worry about the grounds -- it's only if the voltage is much higher, over 200 milli-Volts, that there could be a problem ground. and no damage has been reported as you stated, i've seen many people running down the strip without a battery for weight. Brown with yellow stripe goes to D+ on Bosch alternator (dash light). The only wires ran were positive + red in my case 4 gauge wires between battery, solenoid and alternator and a black - negative to chassis ground. Just go from either your engines alternator ground point to the negative of your battery or take a grounding point from your engine to the negative of your battery. Here's the alternator we want to upgrade to. Every alternator supplier we've ever talked to about this issue says the same thing: Most of the alternators that are returned under warranty have nothing wrong with them whatsoever. Even in the most basic installations, the one-wire alternator is an easy installation with a single charging wire to run from the alternator to the battery. The starter lead is already solidly connected to battery + with a 4awg or larger cable, so its a shorter trip to just go to the starter rather than run a seperate lead all the way to the battery. A battery, a wire from the positive terminal (red for positive) to a switch, another red wire from the switch to a light socket. Will this help or is this dangerous. Simulations of simple shunt voltage regulator circuits to regulate the rectified output of a permanent magnet alternator such as may be found on many motorcycles. The second wire in a typical alternator is the output, which carries the charging current to the battery. Neg (obviously ground) Pos (obviously battery - but should this be wired to the starter selenoid) Reg Exc I have 3 wires that go to the altenator. A "coach" battery powers the lights, furnace, water pump and other 12 volt devices in the coach. 10 - Make sure battery is fully charged before starting engine. Turn all electrical accessories off. Obviously, this approach bypasses the entire ground side of the field, including the ECM. If the voltage is significantly lower, say 12. If the engine ground wire is damaged or the contact point of the alternator and the bracket is rusted, the ground circuit might be disrupted causing various charging problems. Either way it could be a bad alternator. Generally the battery ground lead is connected to the engine block and the alternator is bolted to the same block via metal brackets and thus connected electrically to the battery ground. The circuit would have been directly from the battery positive (because that is where the positive form the alternator connects too) through your spanner to the carcass, to the engine block then to the battery negative. Re: Aluminum Boat Battery Wiring + or - ground Silvertips explanation is the best, but I would break it down this way. is a ground to the frame/block or directly to Batt? What is the other lose cable on the right go to?. third, #2 terminal (sense) should be connected to the battery directly. Batteries designed for marine applications are not the battery of choice for any mobile installation, the fact they have screw terminals notwithstanding. The first is the large lug that connects to the battery. However, i always test things before just throwing parts at the issue. In the case of vehicle DC wiring, that's seldom higher than a few tenths of an ohm. turn the fan until you see the blades that have the most space between em, slide alternator from underneath the vehicle , you have to angle it right to get it past the sway bar. Use a battery charger to charge the battery first if voltages are not adequate. A battery, a wire from the positive terminal (red for positive) to a switch, another red wire from the switch to a light socket. So, this ground is indirectly grounded to the engine via the alternator bracket. ) 5) Increase motor speed to about 1500 RPM. Connecting one side to the master ground terminal near the battery, I "probed" other grounds with the other lead. Others claim that running a ground cable directly to the battery negative is the way to go. If there is a poor connection anywhere along this conductor back to the battery, the voltage regulator will see low voltage and tell the alternator to increase its output. Is disconnecting the battery while the car is running a legitimate method for testing the alternator? I changed the alternator in my car and put in a new one which I bought at autozone (a few people have told me this was a bad idea and that their alternators are crap. The battery supplies electrical power during starting or during periods when the current demand of the vehicle's electrical system exceeds the output capacity of the alternator. JEGS Alternator Ground Wire includes a tab that can be mounted to the alternator case and a ground wire that can be connected to your engine block to insure your alternator is properly grounded. Re: Alternator/battery problem bumps and your radio and interior lights should be fixed by those wires hitting a ground now there might be a short to ground between your alt and your bat maybe new wires would do the trick check the continuity of the wires before you buy new ones tho. Battery damage begins when the internal temperature becomes too high, causing it to gas and heat up. Your ground to go from your alternators ground post to the engine block is totally useless to do. Depending upon the maximum output of the alternator, use the following chart as a minimum wire size guide. Normally the battery is kept charged by the alternator. Battery chemistry. Your alternator should be capable of delivering rated output equal to the maximum acceptance rate of your house battery bank. I have mine connected to the ground side of a charge light with the positive side of the light connected to ignition hot. Then do your best to clean all the engine grounds. Scooters don't usually have a very high capacity alternator/magneto and the battery is typically quite small, with something like a 5 Amp. 7v, it means that your alternator is likely to be overcharging your car battery. The charging system includes the alternator, either an internal or an external voltage regulator, an ammeter or charge indicator light, the battery, a fusible link and the wiring between all the components. The test showed my batter was a little low and out of specification for the battery and it showed the alternator as being good. A properly working alternator can often recharge a dead battery by running the automobile for a period of time. Your electrical problems might be more serious than you think. You can check the amount of A/C voltage leaving the alternator by putting your multimeter leads on the battery (Positive lead on +, and Negative lead on -), with you multimeter set on A/C voltage you should read no greater than. I wouldn’t pull power directly from the aux battery under the hood because that’s a very long cable run. You could just connect to big terminal on alternator or bring it up to the + of battery (my preference). Works great and really gives me the voltage I needed. I have had the battery, alternator, & belt replaced on this vehicle because the engine light randomly comes on sometimes. alternator to the battery. The engine is powering the alternator, and the starting battery has reached 13. The days of being able to drive on just the alternator are over when the battery is dead are long-gone for most modern vehicles. Install RED Power Wire. negative cables go directly to Common Ground Point Many systems have the negative cable running directly to the engine as part of the starting circuit. Normally, there only needs to be one very solid connection from the negative terminal to the frame of the vehicle. BTw is the alternator ground the other connection beside the red sleeved one?. If vehicle has an ignition wire, it does not need to be connected to the alternator.