That means you are losing 2v in the Blk\Og wire somewhere due to high resistance. I'd fix the resistance first. 15.5V isn't crazy high if the alt is not hot (The charging voltage goes up and down with temp from 13.2ish to 15.5ish. Its not that long of a wire, so test the voltage at a few spots along the way from the alt to the batt. You are looking for the spot that it changes from 15.5 to 13.5V. It will likely show as a temp change too, from cool to warm. Do you have access to a thermal camera? ( you may have to compromise the insulation a bit to check the voltage, but you will likely be replacing some wire when you find the culprit.) The thermal camera is remarkably fast and easy if you have access to one. Make sure any new wire is at least as large or larger than the factory black\orange.L\Bronco thanks for the info.found a burnt in half wire on the blk/og wire at the back of the alternator and the alternator is putting out power now. Now to the next issue wire was super hot(obviously reason for the wire connector melting) so i decided to check the voltage on the same wire while running and im at 15.5 volts. So does that mean the regulator on the alternator is bad and not regulating within the proper voltage? the vo;tage at the battery is 13.5 volts while running
Sorry Adrian, are you talking about the big wire from the alt. ? It should go to a fusible link at the solenoid. Also I wouldnt use an ohm meter on the wire. Leave it charging(running) and check the voltage on the wire from the alt to the solenoid in a few places along the way. (you will have to do what is also frowned upon and poke through the insulation)L\Bronco followed the og/blk wire and ended at a 30 amp fuse in the cab.ohms readings were good.went ahead and did what is frowned on and disconnected the battery ground while running(thinking it would tell me if the battery was drawing too many amps due to being weak) still read 15.5 volts at the alternator.im thinking the voltage regulator in the alternator is bad.confirm or deny?