Engine/Transmission (1998.5 - 2002) Check gauges/ No alternator gauge

[Oly]

I've recently had funny quirks after driving for about 1/2 hr, the alternator gauge drops from @15V on gauge (inaccurate I know) to about 10V, then i see the CHECK GAUGES idiot light and the alt gauge is dead.



I'm running a bit below N. O. T. , but warm enough to build heat. PCM 1682 ECM 1693 codes show.



The weird part of this is that I can shut down, immediately restart and the light / gauge thing goes away and we're back to where I started. I already have the alternator but don't want to throw parts at it if i don't need to.



Any suggestions?

 

[Oly]

Update

Thanks for all the help guys



As it turned out the relay assembly for the intake heater grid was the problem. One or both the relays didn't de-energize, I caught it as the intake horn was beginning to REALLY heat up after I shut down. I managed to pull the battery grounds in time but what a pain.



For anybody who gives a crap the part number for this is Mopar# 56026842, which was in a Mopar box from the dealer. Kit is both relays mounted in the bracket that bolts to the inner fender.

 

[RAJohnson]

Oly glad to see you got it fixed