5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
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i have a 86 mustang and the battery will not charge. the battery is good but i cant get power from the alternator to the battery. where is the voltage regulator and where should he wire from the alternator run to?
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the alternator is putting out 12.8 volts but i dont know if it is gettin to the battery. is it a straight wire from the alternator to the solinoid, could i just run a new wire coming from the alternator?
hm. Have you had any work done recently? Check to make sure you've got good ground connections from the alternator to the block, block to body, and battery to body. In my truck I run the main ground directly to the block.
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You have three wires going to alt? or 4? also the big wire is the feed wire to the bat the wire is direct to the solinoid. and the reason that you had 12.8 volts at that wire is because that is system voltage from the bat (current flows both ways ,(remember)) My guess if you have good grounds and you other wires going to the alt are ok then it is the alt. get it tested...............
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i took the alt and got it tested and it is good. i brought it back home and hooked everything back up check all the wires and still nothing. the guy before i had it changed the wiring harness and im trying to make sure he didnt forget a wire. the alt has the two plugs and when the alt is hooked to the soleniod both plugs have power but its the power from the battery. i checked the battery with a voltmeter while the car is running and it is the same as before, around 12.5. does the same wire that gives the alt power, is that the same wire that charges the battery or is there another wire im missing, i can only find one that goes from the alt to the battery. i lost and really need to get this thing fixed. i have been called out by a srt4
You say the alternator was checked and it's good, so just for giggles, have you checked the fuses? Could be as simple as a blown fuse. If the fuses are OK, have you tried running a wire from the - post of the battery to the housing of the alternator. I have seen them have a bad ground and not charge. I would do the above before going to deep into the wiring. Then if those are OK, I'd check the voltage at the alterator terminal where the big wire connects. If it's OK, then you have a problem with the wire from the alternator that supplies the battery, via the solenoid post (maybe a fusible link or broken wire).
i dont think the wire is bad because when i unhook the wire from the solenoid the alt looses power so i know its getting from the battery to the alt but i dont know why its not charging. i ran a ground wire from the alt to the body just to be sure its grounded. how can you check to see if the alt is actually getting power. its shows power on both plugs but its just the battery power. does the alt get power and charge through the same wire??
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