I recently replaced the tachometer on my 1996 Peterbilt 378. I followed the directions to calibrate it, meaning which of the switches on the back of the tachometer to put to on and which ones to put to off. The tachometer works, but the needle starts on 7 or 8, not zero. Is this normal? Or should I take a look at the sensor? Detroit Diesel series 60 engine.Peterbilt Tachometer Question?
should be able to zero, look for adjustment and or check ground connection.
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