Factory Tach Won't Work - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Low69CST · 08-09-2016, 04:22 PM

I had my truck together a few years ago and the tach worked fine. After a few years of sitting, my tach won't work. I have a painless wiring kit and a built 400 small block with a pertronix HEI. Everything appears to be hooked up fine. Is there anything simple I may be missing. It's possible someone may have took something apart and didn't put it back correctly. The wiring diagram has the purple/white wire going from the distributor to the tach. And I also have a yellow wire plugged into the tach. Does anyone have any ideas?

08-09-2016, 04:22 PM	#1
Low69CST Registered User Join Date: May 2000 Location: Frankfort, Kentucky, USA Posts: 2,163	Factory Tach Won't Work I had my truck together a few years ago and the tach worked fine. After a few years of sitting, my tach won't work. I have a painless wiring kit and a built 400 small block with a pertronix HEI. Everything appears to be hooked up fine. Is there anything simple I may be missing. It's possible someone may have took something apart and didn't put it back correctly. The wiring diagram has the purple/white wire going from the distributor to the tach. And I also have a yellow wire plugged into the tach. Does anyone have any ideas? __________________ '69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks



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