In the morning when I first start the truck the voltage output is fine at about 14.2 volts. After I have used the truck for a while, park and turn the engine off, I'll come back and start up again and the voltage shows around 11 volts. It will stay that way for a while until something shifts or wiggles somewhere in the engine, at which point the voltage will then climb up to the normal 14.2 volts. The voltage to the small wire in the plug on top of the alternator reads 1.27 volts (don't know if this is the field wire) while the output is low. Any idea what the voltage should be on the small wire and is that wire fed from the PCM, AND is there a name for that wire.
have the same problem?
Tuesday, May 20th, 2014 AT 5:52 PM