Tach Issues ,'71 GTX

[gary h]

I recently went back to Points ignition , it was Mopar electronic ignition and now my factory tach doesn't work . Any thoughts ?

 

[levicah]

I recently went back to Points ignition , it was Mopar electronic ignition and now my factory tach doesn't work . Any thoughts ?

I would intercept the signal wire in between the gauge and the harness, identify it, and then look for it at the neg. terminal of the ignition coil and in or around the distributor. If it's wired to the ignition coil, go back and cut the ground behind the gauge and screw it to the chassis under the dash. If you cant locate the signal wire by the distributor, cut and splice and extend a new separate signal wire from behind the gauge and route it to the negative post on your coil. If it still doesnt work, they were both cut off, you'll need to splice a ground wire also and screw it to frame or chassis under the dash. Easy peasy. Look up a wiring schematic for your instrument panel...the signal wire is probably dead ended inside the wire connector plugged to your distributor.

 

[gary h]

Follow-up, I found that my Evans Ignition harness was missing the Tach wire and the spade terminal too. I removed the wire from the previous harness ,installed it and now my Tach functions ! A Good Day today ! A Thanks goes to levicah for responding back in July.