Amp.gauge quit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**WorkinLonghorn** · 02-18-2007, 01:14 PM

OK,it had some help. I had a situation where the alternator would not charge unless I rev-d the engine way up before driving.Then I would get charging until next start-up.If I forgot to rev it up then the truck would just run on battery until dead. Took the regulator back to Autozoneout and it checked out good.I checked all wires and took the wires off the little black junction box by the battery and cleaned them up.Replaced the main red wire that runs along the top of the radiator because the insulation was bad.
>>now it seems to be charging but the Amp gauge is not working. I can't see from the wiring diagrams what I could have done wrong.It doesn't make sense.
>>So how does the wiring go to/from the amp gauge? Maybe I'll just run new wires,or trace the old ones. Much thanks-Brian

cdowns · 02-18-2007, 02:33 PM

check the 2little fuses in the wiring harness that runs accross the core support

**WorkinLonghorn** · 02-18-2007, 09:15 PM

Funny thing is,there where no fuses or links. A couple months ago there was a short under the dash and that entire thick red wire melted (the insuation) all the way into the cab and filled it with smoke.I had to jump out and disconnect the battery,then find the short. So perhaps this is partly why things are weird now.

02-18-2007, 01:14 PM	#1
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Amp.gauge quit OK,it had some help. I had a situation where the alternator would not charge unless I rev-d the engine way up before driving.Then I would get charging until next start-up.If I forgot to rev it up then the truck would just run on battery until dead. Took the regulator back to Autozoneout and it checked out good.I checked all wires and took the wires off the little black junction box by the battery and cleaned them up.Replaced the main red wire that runs along the top of the radiator because the insulation was bad. >>now it seems to be charging but the Amp gauge is not working. I can't see from the wiring diagrams what I could have done wrong.It doesn't make sense. >>So how does the wiring go to/from the amp gauge? Maybe I'll just run new wires,or trace the old ones. Much thanks-Brian __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.

02-18-2007, 02:33 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Amp.gauge quit check the 2little fuses in the wiring harness that runs accross the core support __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

02-18-2007, 09:15 PM	#3
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: Amp.gauge quit Funny thing is,there where no fuses or links. A couple months ago there was a short under the dash and that entire thick red wire melted (the insuation) all the way into the cab and filled it with smoke.I had to jump out and disconnect the battery,then find the short. So perhaps this is partly why things are weird now. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.



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