94 pontiac grand prix 3.1. when driving in the day it seems fine, at night or when you put a load on the eletrical system the gauges go crazy, the lights go crazy and it runs like crap... alternator and batt are good all connections that I can check look ok the starter is new the egnition switch is new... complete tune up from top to bottom, when all this is happening the windows will not roll up either... somewhere in the eletrical but not sure what else to check... any ideas???
2007-01-05 08:16:52 · 5 answers · asked by rostang50 2 in Cars & Transportation ➔ Car Makes ➔ Chevrolet
Loose Instrument panel ground. Located under the knee bolster on the drivers side. 10mm nut on the bar that supports the bolster. There are 2 of them, Remove, clean the surface ind reinstall the bolt with a new star washer.
Just my opinion, I might be wrong.
2007-01-05 16:22:52 · answer #1 · answered by Mike 3 · 0⤊ 0⤋
Relays under the hood are loose, or worn out.
At the distibution box there are 4-6 relays that control different circuits. Ie: Lights, blower motor, wipers, etc.
Remove the cover, and look at the back of the cover.
It should tell you which relay controls the "main" and/or "Ignition."
Try swapping them out to see if that helps in the short-term.
The other possibility is the positive terminal on the alternator is loose.
Or, bad ground wire from the battery to the engine.
Could be more, but check those first.
2007-01-05 08:24:52 · answer #2 · answered by Mr. KnowItAll 7 · 0⤊ 0⤋
I have a feeling a wire inside the dash has corroded and it shorting or grounding. Probably the wiring for the lights. regardless one of the wires in that vehicle are arcing or grounding out on something. not good!
2007-01-05 08:21:46 · answer #3 · answered by peppler10 1 · 0⤊ 0⤋
Take a look at the grds to the body
2007-01-06 03:15:37 · answer #4 · answered by deltech 4 · 0⤊ 0⤋
check all wiring relays
2007-01-05 09:03:55 · answer #5 · answered by wheels47012 3 · 0⤊ 0⤋