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The Engine Tachometer in our Champion Europremier was working intermittently for a while and finally quit this summer. I tested the wires on the back, both grounds were good, power had good voltage and the signal line appeared to have varying voltage as I revved the engine. Soooo I figured the tach must be bad. Turns out the signal is AC so my DC voltage test was no good.
I took the tach out and went over to Bob's Speedometer near Hartland, MI and they tested it for FREE. Very nice!!
Matt was very knowledgeable and willing to help. He led me back to the test bench and showed me how he tested it with a very expensive looking instrument. Tach is good he said, works perfectly, so sensor or wiring at sensor must be bad. He explained to me how to find the sensor and what it should look like on our old Cummins engine and suggested I take it out and try cleaning it. If that doesn't work I'll be looking for a new sensor.
I took the tach out and went over to Bob's Speedometer near Hartland, MI and they tested it for FREE. Very nice!!
Matt was very knowledgeable and willing to help. He led me back to the test bench and showed me how he tested it with a very expensive looking instrument. Tach is good he said, works perfectly, so sensor or wiring at sensor must be bad. He explained to me how to find the sensor and what it should look like on our old Cummins engine and suggested I take it out and try cleaning it. If that doesn't work I'll be looking for a new sensor.