Factory tach stopped working - Impala Tech
Troubleshooting Diagnosing problems

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post #1 of 2 (permalink) Old 08-11-2019, 04:24 PM Thread Starter
Join Date: Aug 2019
Posts: 1
Factory tach stopped working

Just picked up a 1964 409 biscayne! It has the factory tach in it that worked when I test drove it and the first time I took it out after coming home it worked. Now it has completely stopped working. My question is is there anyway to test it? When I shut the car off the need moves but otherwise it doesn’t register anything. I followed the three wires. The two that go to the fuse panel are attached and fuses are good and The other goes to the negative side of the ignition coil and seems just fine. Any ideas?
Tk64biscayne is offline  
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post #2 of 2 (permalink) Old 08-11-2019, 10:58 PM
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Join Date: Apr 2013
Location: Canada
Posts: 364
There must be a ground wire somewhere I would think?

I am guessing the two to the fuse box are pink (12V) and gray (light)?

And yes, brown to negative on the coil.
Darth is offline  
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