I have a 81 bj 42, i have had charge issues since i owned this truck(2 weeks), i took the alt off and to the alt shop, they told me the rotor is fxxxed, so i happen to locate another one, i instal it and i ave the excact same issue, that is no change in votage from 25 volts till i rev the truck to 2000 ish or more then it goes to 27.25 ish, i have 25 v to the one side of the slip ring from the reg, and have grounded the other, neither has increased the voltage, i am at a loss as to what to replace, as the reg seems to werk to reg voltage at high rpm, as well as turns of voltage to the rotor under key off. I have three wires off the alt, but not the factory plug(someone has changed these, i worrie they are wrong but need to find info to prove what goes where so i do not damage anything( very weiry with sutch a rare alt) any thing you think i can do to porve or confeirm bad parts, the alt shop said the diodes and rectifier where good. i just feel i need more info.
what kinda resistance should i see though a rotor, i had about 25 k if meory serves, either way it was the same as the other one i just replaced, and they both passed voltage though them.
Myles
what kinda resistance should i see though a rotor, i had about 25 k if meory serves, either way it was the same as the other one i just replaced, and they both passed voltage though them.
Myles