67 wiring interchangable with 72 wiring? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

matt_field · 10-08-2006, 11:39 AM

i have a 67 chevrolet pickup im restoring and i have 72 warning light dash wiring im putting in it... for the engine bay harness it is a 67 wiring, is this interchangeable? also i think the 67 wiring i had came out of a truck that had gauges instead of warning lights.. i hope this makes since

matt_field · 10-08-2006, 05:31 PM

anyone? someone has had to do this before

**john** · 10-08-2006, 06:46 PM

I'll try to help since no one else has. You would be better off using matching harnesses. The guage harness will have ammeter wires in the engine loom amd a warning lamp harness would have temp amd oil pressure light wires. Then the it would be the same on the dash harness. These are just two, there might be more. There is a diagram on GMC Pauls site in the tips section which shows the wire positions in the cluster plug for guage and lights. I imagine it can be done with some rewiring.

Rod · 10-09-2006, 12:28 AM

kinda depends how good you are at reading wiring schematics also.

there are difference on inside wiring harnesses besides making the guages works, you could have reverse lights or neutral safety issue depending on the inside harness you have from the 72.

**VetteVet** · 10-09-2006, 11:10 AM

The key switch is in the column on the 72 and in the dash on the 67 so wire lengths are gonna vary as well. I think the engine compartment is the same. The schematics are great for showing where the wires go, but they don't help much for locations of parts and lengths of wires. It is possible to convert the wiring, but it will take some effort.The dashes are different as well, and will require quite a bit of rewiring if going from idiot lights to gauges.
There are threads on the forums showing how to do this and several guys have done it so they may be of more help.

10-08-2006, 11:39 AM	#1
matt_field Registered User Join Date: Apr 2001 Location: Detroit Lakes, Minnesota Posts: 885	67 wiring interchangable with 72 wiring? i have a 67 chevrolet pickup im restoring and i have 72 warning light dash wiring im putting in it... for the engine bay harness it is a 67 wiring, is this interchangeable? also i think the 67 wiring i had came out of a truck that had gauges instead of warning lights.. i hope this makes since __________________ 1971 k5 blazer 80k mike survivor 1972 3/4 ton 4wd Cummins 12v 1967 swb 2wd 427bbc 1968 4wd shortbox 1971 Cheyenne swb k10 unrestored 1971 Cheyenne super 40k 402bb survivor 1967 Chevy k10 (first truck) 1968 L78 camaro survivor 18k miles 1969 z28 survivor 60k miles 1969 z28 survivor 39k miles 1969 z28 rs survivor 80k miles

10-08-2006, 05:31 PM	#2
matt_field Registered User Join Date: Apr 2001 Location: Detroit Lakes, Minnesota Posts: 885	Re: 67 wiring interchangable with 72 wiring? anyone? someone has had to do this before __________________ 1971 k5 blazer 80k mike survivor 1972 3/4 ton 4wd Cummins 12v 1967 swb 2wd 427bbc 1968 4wd shortbox 1971 Cheyenne swb k10 unrestored 1971 Cheyenne super 40k 402bb survivor 1967 Chevy k10 (first truck) 1968 L78 camaro survivor 18k miles 1969 z28 survivor 60k miles 1969 z28 survivor 39k miles 1969 z28 rs survivor 80k miles

10-08-2006, 06:46 PM	#3
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: 67 wiring interchangable with 72 wiring? I'll try to help since no one else has. You would be better off using matching harnesses. The guage harness will have ammeter wires in the engine loom amd a warning lamp harness would have temp amd oil pressure light wires. Then the it would be the same on the dash harness. These are just two, there might be more. There is a diagram on GMC Pauls site in the tips section which shows the wire positions in the cluster plug for guage and lights. I imagine it can be done with some rewiring. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

10-09-2006, 12:28 AM	#4
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Re: 67 wiring interchangable with 72 wiring? kinda depends how good you are at reading wiring schematics also. there are difference on inside wiring harnesses besides making the guages works, you could have reverse lights or neutral safety issue depending on the inside harness you have from the 72. __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

10-09-2006, 11:10 AM	#5
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,709	Re: 67 wiring interchangable with 72 wiring? The key switch is in the column on the 72 and in the dash on the 67 so wire lengths are gonna vary as well. I think the engine compartment is the same. The schematics are great for showing where the wires go, but they don't help much for locations of parts and lengths of wires. It is possible to convert the wiring, but it will take some effort.The dashes are different as well, and will require quite a bit of rewiring if going from idiot lights to gauges. There are threads on the forums showing how to do this and several guys have done it so they may be of more help. __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.



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