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Batteries

Can a bad alternator burn the wire between the battery and alternator?

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Wiki User
2013-09-26 09:28:37
2013-09-26 09:28:37

Yes, if it shorts to ground internally.

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run it and then disconnect the negative wire from the battery if alternator dies its bad.

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Likely a inline type (fuseable link wire) look for a section of wire usually near the battery that is discolored or try to stretch the wire they can burn off or break internaly, test this wire at back of alternator with test light and engine and key off, you should have power at the output terminal as long as the battery cables are connected.

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ALternator fuses, if equipped may be on the battery post, in a fuse box, or in the wire going from the battery to the alternator.

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the positive wire that recharges the battery after being drained from the starter

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alternator, or a wire to alternator loose

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This wire allows the alternator to keep the battery charged.

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Usually when the battery light comes on its the Alternator, or a bad wire from Alternator to battery, but id check Alternator first.

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The fuse between the battery and alternator is a fusible link in the small wire that hooks up to the battery terminal along with the regular battery cable. It looks like a thick spot in the wiring. To replace, the cable must be replaced. .

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The alternator is not getting power? At any of the wires or just the main/largest one? If you are testing the large wire, this is the output side that runs to the battery. If there is no power in this wire where it connects to the alternator it must have a bad connection at the alternator or at the battery or a break somewhere in between. If there is power there, I would look at the fuses.

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Indirectly. The positive cable on the battery is hooked to the starter. The other wire on the starter post goes up to the alternator.

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usualy if the alternator is not defective then its the battery. you should start by cleaning the battery post. then you could check the terminal wire that runs from the battery post to the alternator. if thats not it you should check the ground on the alternator.

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in a series battery, alternator, ignition

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bad battery, and bad alternator not keeping it charged - also bad connections to the battery or loose wire connections on the alternator.

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its either the alternator the battery is bad or a loose or bad wire on the starter

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2 wire has a live wire to energise the field where as the single wire alternator self energises and does not need the powered feed.

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sense wire has to have 12v on it to tell the alternator to charge - bad/broken wire,,, possible pcm failure.... disconnect sense wire from alt - jump terminal to the battery to see if it charges - if it does - you have found the problem

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assuming that no one has cut a wire, the alternator is probably bad. could be a fuse. Depending on car, it could be a fusible link. Process of elimination. The main large wire on the back of the alternator runs to the battery. Should be smaller wire on the positive cable.

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Disconnect the battery and just remove the bolts holding the alternator, disconnect the wire connection and remove the alternator.

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The easyest way is to go with a 1 wire alternator (self exciting). Find or make brackets that will work, mount the alternator and run 1 wire from the alternator to the battery.

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get a multi meter that reads dc voltage & touch the black (negative -) wire to the negative battery post & the red (positive +) wire to the positive battery post with car running. car off is battery voltage, car on is alternator voltage.

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It runs from the hot wire on the back of the alternator to the red battery box.

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Not much to it, get the one wire alternator, and brackets from a 302 and mount it up, belts will be the same as the 302, wire goes to the battery. # wire is a bit different, red lug goes to battery, botton 2 wire plug should be exciter and is ignition power and a ground.

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Buy a one wire hook up alternator and route about a 10ga wire from its output terminal to your battery positive or to fuse block, use a piece of fusible link or a circuit breaker rated about the same as your new alternator.

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The third wire is for whats called the sensing or pre-excitation circuit. This wire supplies the initial current from the battery to the alternator's field coil that starts the buildup of the magnetic field that allows the alternator to start producing current.


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