Burnt TicTocTac?

[mikeyfrano]

I burnt my underdash wiring harness last year, replaced it and now my tac doesn’t work. I guess I could have burnt my tac wires(nothing obviou), but could I have burnt my tac up? ‘70 GTX

 

[pnora]

You need to verify keyed power and distributor signal. If both are there then its a problem in the tachometer.