1991 GMC C2500

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  • 1991 GMC C2500

Electrical problem
1991 GMC C2500 V8 Two Wheel Drive Automatic 200000 miles

i am having a wiring problem- I have heard about the early 90's trucks gauge panels going out- I was driving and looked down and saw that all my gauges had went nuts-all exp. Speed. So I was going to try to make it on to the house but then noticed headlights getting dim-hmm pulled into autozone with enigne running and checked alt. No good-so replaced it- jumped it off and went to leave but headlights still dim so pulled back in walked inside to borrow voltmeter- I checked the wiring going to the alt. Guess what- the "igintion hot" was dead- so I cut and run a temp. Wire over to batt to check- started it back up and guess what- full 14.7 volts! Put old alt. Back on with the temp. Wire run to batt. To make it home. Well here is the problem -i replaced the "faulty gauge panel" andstill I am poping fuse- 20 amp as recom. Checked everything I could think of - unplugging 1 at a time to check for shorts- computer, then plugs going to steering column, most sensors - temp. Oil, then moved on down the line, well I am stuck---- what a headache- I have started to remove entire dash to look for a short or maybe a rubbed though wire or somthing- this is driving me nuts! All lights work- just no power to alt. From firewalll, and fuse for gauges keeps poping -HELP

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have the same problem?
Saturday, December 20th, 2008 AT 10:26 PM

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