Ive seen that on the newer tachs (90s) the circuit board on the back has some parts that run hot and the soldering goes bad, resoldering them tends to fix them but I've never done it to that one yet
Resolder all the PCB connections, then test the sender with an ohmmeter. 2000-3000 ohms is a "good" reading. If none of that fixes it, scrap yard time! Probably pick up a new head for like $10.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.