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My tach is keeping beat with my turn signal or not working at all. Just bought this unit used. where do I start? is it the turn signal relay after the fuse board causing this?
I thought the tach was mechanical.
As I am un-sure what system you have I will need to keep it general. I am willing to bet the dash systems have a common ground stud or srew and yours is poor. Check the ground with an ohm meter and accept 0 ohms as acceptable to start. But its almost imposible to get that good 0.1 ohms is considered acceptable but I like to do better. Good luck
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