Autometer guage (TACH) inop

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Nov 7, 2012 | 04:21 PM

sscamaro387

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From: San Jose

Autometer guage (TACH) inop

I have just finished my conversion to a LS3 and T56 tranny into my 67 camaro.
The wire harness is a prt# 19258267 - GMPP LS376/480 Controller Kit.

All the other guages seem to work. but the tach does not. we have tried using the diagrams from Chevy performance but it still does not work.

Does anyone have anyone that can lead me in the right direction to fixing this issue?

thanks,

Nov 7, 2012 | 04:41 PM

74novacustom

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have you tried the resister with 12v to the signal wire? thats what i had to do.

Nov 7, 2012 | 04:44 PM

sscamaro387

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yeah we tried that. we checked all the pins from the connectors and everything.

Nov 7, 2012 | 07:14 PM

68sixspeed

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From: Connecticut

I'm using the gmpp harness on the ls7, autometer tach set for 4 cyl, and a step up resistor but if I recall correct not the one listed in the gmpp instructions. I'll have to check the resistance, I got it off this site.

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