Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 11, 2025 ...

Speedometer and Tachometer are not working.

September 22, 2020, 05:28:50 pm

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?

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Re: Speedometer and Tachometer are not working.

Reply #1 – September 23, 2020, 06:00:14 am

Both gauges may be bad.  No compressor involved.

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Re: Speedometer and Tachometer are not working.

Reply #2 – September 23, 2020, 09:18:59 am

Thanks, don you have any idea where to get those old style gauges?

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Re: Speedometer and Tachometer are not working.

Reply #3 – September 23, 2020, 09:19:41 am

I meant do you have any idea where to get those

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Re: Speedometer and Tachometer are not working.

Reply #4 – September 23, 2020, 10:23:38 am

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

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Re: Speedometer and Tachometer are not working.

Reply #5 – September 23, 2020, 11:21:00 am

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$

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Re: Speedometer and Tachometer are not working.

Reply #6 – September 23, 2020, 09:15:53 pm

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

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