RPM/speedometer

[Shoemjay]

Can someone help me out and tell me were to start with fixing my rpms and my speedometer. They both randomly work, and when real cold they dont work at all.

 

[joesho_gb]

What year and MTX/ATX?

 

[Shoemjay]

1991 Plus MTX, thanks reply

 

[93rev2sev]

Can you be more specific about what happens when it fails? Do both guages drop to zero?