ABS and Spedo Fault

Sep 20, 2004 3 Replies

Hi,



My father has a 1996 C250 Classic Diesel Saloon (UK Market). The ABS light is on all the time whilst driving and the spedometer does not work. I was wondering if these are related. Does this model use the ABS wheel sensors to generate a signal for the spedometer, and if so which one (or all)? Anything else it might be? What would I need to diagose a faulty sensor? I have a DVM and oscilloscope, but what signals / voltages should be present.



Many thanks in advance of any reply,



Jon Symonds


No speedometer uses ABS signal to get speed... it is all from tranny.

I suggest you check your overload relay fuse first... usually when this is blown, the ABS light will come on.

Speedometer problem can be fuse related... take out the fuse and replace it with a new one.

Thanks for that, do you have any idea where it is located on this model?

Much appreciated,

Jon.

All the fuses are in the hood area... in the fusebox. Open up your owner's manual and it will show you where... or search the internet if you don't have a manual.

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