1969 GMC Wiring Questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69gmc292 · 04-02-2007, 08:37 PM

I have a 1969 GMC 1/2-ton pickup that has a 292 and a TH350. I went thought the entire wiring system and replaced the wiring that was bad and fixed the parts that were missing. The guy i bought the truck really did a number on it because the truck had a eletircal short. I followed the 1968 Wiring diagram in the 1967-1972 factroy assembly guide and thought i got it right. The question is i think that the main charging system is wrong because when i have key on the run position everything works like the heater, headlight, turn and brake lights, but when i turn the key is is the off positions everything turns off and the entire electrical system goes dead. Do I have something wrong or is this so post to happen.

BurnoutNova · 04-02-2007, 09:25 PM

on my 71 the heater doesnt work with the key on, but the horn, hazzard light and all the lights work with the key off.

Longhorn Man · 04-02-2007, 10:39 PM

heat, turn signals, back up lights, wipers, and radio... I think that's everything that's shut off with the key.
Well, power to the distributor too.

04-02-2007, 08:37 PM	#1
69gmc292 Registered User Join Date: Mar 2007 Location: tucson Posts: 71	1969 GMC Wiring Questions I have a 1969 GMC 1/2-ton pickup that has a 292 and a TH350. I went thought the entire wiring system and replaced the wiring that was bad and fixed the parts that were missing. The guy i bought the truck really did a number on it because the truck had a eletircal short. I followed the 1968 Wiring diagram in the 1967-1972 factroy assembly guide and thought i got it right. The question is i think that the main charging system is wrong because when i have key on the run position everything works like the heater, headlight, turn and brake lights, but when i turn the key is is the off positions everything turns off and the entire electrical system goes dead. Do I have something wrong or is this so post to happen.

04-02-2007, 09:25 PM	#2
BurnoutNova Registered User Join Date: Mar 2004 Location: CA Posts: 2,057	Re: 1969 GMC Wiring Questions on my 71 the heater doesnt work with the key on, but the horn, hazzard light and all the lights work with the key off.

04-02-2007, 10:39 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: 1969 GMC Wiring Questions heat, turn signals, back up lights, wipers, and radio... I think that's everything that's shut off with the key. Well, power to the distributor too.



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