Join Date: Jun 2002
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Tach installation with HEI
I just bought a 72 Chevy Suburban. It has the aftermarket factory looking tach in the instrument cluster (not hooked up). I pulled the dash out and hooked up wires to the connections. I found a location on the HEI distributor cap for the tach connection. I connected one wire there and the other to a ground. Nothing happened. I don't have a wiring diagram for the tach so I was guessing where the wires went. I switched the wires around and this time it killed the engine.
What am I doing wrong? The engine is a V8 and the tach is set for a 8 cylinders.
Thanks for your help.