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Topic: Speedometer and Tachometer are not working. (Read 738 times) previous topic - next topic

Speedometer and Tachometer are not working.

When I drove the MH the first time the speedometer worked erratically. The tachometer never worked. Now neither is working. I have power to my gauges. My manual says that it could be the compressor. I can't locate any kind of compressor around the transmission. The only thing I see is what I believe to be a speed sensor on the tail shaft, the wires go back to the side of the transmission.

Any ideas on where this mystery compressor maybe located? Or any ideas on the reason for no tach or speedo?

Re: Speedometer and Tachometer are not working.

Reply #1 –
Both gauges may be bad.  No compressor involved.

Re: Speedometer and Tachometer are not working.

Reply #2 –
Thanks, don you have any idea where to get those old style gauges?

Re: Speedometer and Tachometer are not working.

Reply #3 –
I meant do you have any idea where to get those

Re: Speedometer and Tachometer are not working.

Reply #4 –
The common connection between these two is the ignition solenoid.  I would check it to be sure that all is well there before replacing gages.  I have replaced my solenoid to correct this same situation,  but mine included other gages and finnaly they all quit working.  Have a great day ----  Fritz

Re: Speedometer and Tachometer are not working.

Reply #5 –
Check the ground wires from each. They might be green and go to a stud.  Snug it and maybe they will come alive. If both have power of course.

 I used a GPS speedo . works nice.  80$
 

Re: Speedometer and Tachometer are not working.

Reply #6 –
I put a volt meter on the signal wire. It is reading a steady 12.9 volts with no variation throttling up or down.