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Old 07-31-2018, 11:04 AM   #8
dagnabbitt
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Join Date: Dec 2014
Location: Edmonton Alberta
Posts: 1,311
Re: tach install trouble

Quote:
Originally Posted by Ironangel View Post
Also make sure your battery is grounded to the motor, and the motor to the cab, and cab to frame!
I second that. If it already looks like you have the grounds there, check them for corrosion and replace them. I would also ground the motor to the frame with a hefty strap for good measure. I did it when I put my NVU gauges in and experienced the problem you are having: and it straightened right out. And anyway, adding and checking grounds is never a waste of time or money.
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