Seven gauge upgrade - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ron lechman · 01-03-2018, 01:34 PM

I have a 68 C10 with the basic speedo/gas/idiot light cluster and want to install a used full gauge instrument cluster that i bought.

Can I use my current wiring harness that plugs into my basic cluster or do I have to change or modify my wiring harness?
I realize that I have to run an oil line to the engine for the oil pressure gauge.
What do I have to do about the ammeter and water temp for their signals?

I've ordered a new bezel,5000 RPM tach, lens with tach and vacuum and a printed circuit w/tach that I plan on using in my truck. I still need to find a vacuum gauge that is in my budget.
I look forward to enjoying these upgrades to my C10.

zosoppp · 01-03-2018, 02:22 PM

you need to change the wiring in the harness plug to the instrument cluster. Do NOT plug a gauge cluster into an unmodified idoit light harness (or vice versa) WITHOUT changing some of the connections around, you will damage something (maybe the fuel gauge).

See this as a start:

http://67-72chevytrucks.com/vboard/s...d.php?t=645940

**VetteVet** · 01-03-2018, 06:44 PM

The link above along with tis one should get the job done.

http://67-72chevytrucks.com/vboard/s...d.php?t=588853

ron lechman · 01-03-2018, 08:55 PM

Thanks for all the information guys.
Tackling this conversion is going from scary to exciting with this new knowledge.
Cheers!! Ron

01-03-2018, 01:34 PM	#1
ron lechman Registered User Join Date: Dec 2014 Location: winnipeg, manitoba Posts: 80	Seven gauge upgrade I have a 68 C10 with the basic speedo/gas/idiot light cluster and want to install a used full gauge instrument cluster that i bought. Can I use my current wiring harness that plugs into my basic cluster or do I have to change or modify my wiring harness? I realize that I have to run an oil line to the engine for the oil pressure gauge. What do I have to do about the ammeter and water temp for their signals? I've ordered a new bezel,5000 RPM tach, lens with tach and vacuum and a printed circuit w/tach that I plan on using in my truck. I still need to find a vacuum gauge that is in my budget. I look forward to enjoying these upgrades to my C10.

01-03-2018, 02:22 PM	#2
zosoppp Registered User Join Date: Mar 2014 Location: Lincoln Park, NJ Posts: 189	Re: Seven gauge upgrade you need to change the wiring in the harness plug to the instrument cluster. Do NOT plug a gauge cluster into an unmodified idoit light harness (or vice versa) WITHOUT changing some of the connections around, you will damage something (maybe the fuel gauge). See this as a start: http://67-72chevytrucks.com/vboard/s...d.php?t=645940 __________________ 1970 C10 LWB 350SBC, SM330 Muncie (not saginaw SM326) (on tree), 3.07 open (assumed), PS, PB, Idiot lights

01-03-2018, 06:44 PM	#3
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,709	Re: Seven gauge upgrade The link above along with tis one should get the job done. http://67-72chevytrucks.com/vboard/s...d.php?t=588853 __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

01-03-2018, 08:55 PM	#4
ron lechman Registered User Join Date: Dec 2014 Location: winnipeg, manitoba Posts: 80	Re: Seven gauge upgrade Thanks for all the information guys. Tackling this conversion is going from scary to exciting with this new knowledge. Cheers!! Ron



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