Speedometer and odometer stopped working !! help!

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ok, so were just driving along on the highway and all of a sudden the speedometer and odometer just stopped working.. ! any ideas on what could be wrong? would it be a fuse and if so which one? or is it the wheel sensor, and if so where would that be? or is it a short in the back of the gauge cluster? any and all help would be greatly appreciated, thanks..

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by the way, the car is a '83 240 DL . thanks.

[a70gtx]

Its probably just a speedometer cable it runs from the back of the speedometer to the transmission about a 1/4 in flexible cable.