Electrical Tachometer issue

ras50gt

Member
Oct 25, 2005
200
2
19
Slowly restoring my 93 gt. The tachometer needle goes in reverse then back to 0.


Anyone find a fix for this? Recommend a place to start? This started randomly when I first bought the car. I ended up putting in an aftermarket tachometer and tried to not look at it haha. About time to get it working normal again. Thanks in advance!

The dreaded flashing airbag light just started
 
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I’d pull the tach out and bench test it.

You can use this procedure to see if it’s a tach issue, or an issue with the wiring from the coil.

This is a tach calibration vid, but you can use that same $10 Amazon signal generator to command certain rpm signals and see if the tach responds correctly. Then you can determine if you need to get a new tachometer, or investigate the wiring/tach signal.


View: https://youtu.be/UkHoSIdTpbc