Tachometer - Impala Tech
Electrical & Wiring Troubleshooting electrical problems

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post #1 of 3 (permalink) Old 08-06-2014, 04:07 AM Thread Starter
Join Date: Jul 2014
Location: Phoenix
Posts: 9

Hello today i decide to mess with my tachometer on my 1964 impala ss. It wasn't working when i got the car so i found a diagram of how its suppose to be wired . This is the diagram i was looking at

I noticed when i took it off the dash it had no ground
And my black and pink wire 1 of them was cut same for the Gray wire 1 was cut also
I noticed in the diagram it looks like its suppose to have two but these were cut for some reason.

And this is where he had them going to .

So what i tried to do was ground the tach and run the brown wire on the negative side of the coil and i got nothing . Any feedback will be greatly appreciated. And one more question anyone know of a good posi for 64 ss. Thanks
sixT4ss is offline  
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post #2 of 3 (permalink) Old 08-06-2014, 08:43 AM
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Best bet is to contact Donny on here from American Auto fire for help with wiring, I would also see if he has the replacement harness.



1966 Impala SS

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post #3 of 3 (permalink) Old 08-06-2014, 08:55 AM
Join Date: Jan 2006
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I would also check to see if it is a GM part and not a Sun Tach or a Dixco bought after the car was built. GM parts normally have the part number stamped into it.

Big Dave
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