There should be a switch with engine settings on it.
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Set the meter for "tach" or "dwell. When using the meter, switch back and forth between tach and dwell. Robert Bayly, based in Apple Valley, California, began writing in , his "how to" articles can be found on eHow. With more than 15 years in the auto industry, Bayly has been an auto and diesel mechanic, service writer and parts manager.
How to Connect a Tachometer to the Chevy 350
He received certificates from Pontiac parts system , Cat Diesel engine service , Saab and Fiat parts- warranty system. No the Tach terminal is already connected to a white wire, running somewhere I can trace it to. I dont have a tach in my cluster, so shouldnt the tach connector be open? Anybody know why the tach connector would already be connected in my car? Chevrolet Suburban K20 Silverado Guide: Do you have a remote start system on the truck?
If not, maybe a PO had an aftermarket tach installed and just cut the wire and left it in the dash somewhere. Originally Posted by wyattglock. I would disconnect the existing wire and hook up the tach. See if the truck will start and drive it around the block.
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I'm not familiar with the white wire you're speaking of. Another option would be to connect the existing wire and your new tach wire together. Originally Posted by S10Fan. I checked the Chilton manual today and it shows the white wire in the electrical diagram from my 86 mode.
Last edited by kikkegek; at Hi kikkegek, What type of carburetor is on your truck? The reason I ask is because GM used some carbs with a computer-controlled mixture solenoid setup in the 80's.
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Mostly found on cars but I've heard some trucks got them too California emissions mostly I think. Anyway, many of those computer-controlled carburetor setups have a wire connected to the HEI tach terminal to send a tach reference signal to the computer. If that's the case, you'll need to keep that wire hooked up, but I don't see any problem tapping into it to hook up your new tach. I checked and the white wire is not connected to the carb.
But I cant seem to find where it goes I only see it drop down behind the engine to the passenger side and dissapear into a hose cover for several cables. Cant seem to trace it where it goes to.
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I'll just tap into it and see if my tach works The car was imported from california last summer. But I get no rpms displayed.
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My wiring diagrams from Haynes and Chilton only say the white wire from the TACH connection should run to the tachometer. But doesnt in my case.
There is a vacuum diagram in teh Chilton, but no electronics. How many wires do you have with your tachometer? I believe there is supposed to be a green, red, black, and white The white should be for the lights Originally Posted by kikkegek.