Engine/Transmission (1994 - 1998) Tac and lock problems

[JBurtrum]

My tac and door locks are working intermittently. Has any one had a simular problem and if so what is the solution?

 

[Missouri Mule]

Are the tach and the locks going out at the same time or seperately?



The tach receives a signal from the PCM which receives a signal (then translates it) from the Engine Speed Sensor.

Usually when the ESS is going/gone, dirty connector, bent pins in connector there are symptoms such as alternator not charging, overdrive not working (auto trans)and somtimes AC not working.



If there are no other symptoms I would look at the ground/wires to the Tach or the tach itself.



Door locks, look at lock motor/ wires/ connector/ground.