I've got a battery charge problem. Drove truck for a while and eventually battery died. I put another spare fresh battery in and checked voltage across battery before and during running and it's staying at about 12V. It's not jumping up to 14-14.5V when running, so first thought is alternator. I put in new alternator that tested good at Advanced auto parts. I touched the battery output at the back of the alternator and it's reading 12V(when trucks running), same as battery. I've done the same on another car of mine and it showed the 14-14.5V I'm supposed to be getting??
Next I replaced the voltage regulator at advice of auto parts stor guy, didn't fix.
I don't understand that alternator circuit very well, I've got 2 wires in back of alternator. 1 large one that runs directly to battery post on starter solenoid(I assuem this is the one that acts to recharge the battery?) and smaller one that runs from "FLD" on back of alternator to "F" input into voltage regulator. Can somebody expand on function of these two wires, any suggestions on what else to check...Help!
Next I replaced the voltage regulator at advice of auto parts stor guy, didn't fix.
I don't understand that alternator circuit very well, I've got 2 wires in back of alternator. 1 large one that runs directly to battery post on starter solenoid(I assuem this is the one that acts to recharge the battery?) and smaller one that runs from "FLD" on back of alternator to "F" input into voltage regulator. Can somebody expand on function of these two wires, any suggestions on what else to check...Help!