The tachometer in my gauge cluster has not worked since I bought my car. I thought it was the Tach that was ruined so I bought another guage cluster and installed it but the Tach failed to work even then. Then I got the engine swap done thinkin maybe the wiring was wrong but the tach still didnt work, so I am guessing that the problem may be with the wiring in the interior of the car? Please help me out on what to look for or if anyone may know the problem..... (I would not like to have an aftermarket tachometer.)

Thanks!!

Btw its a 1997 ex