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Kingman, Kansas | I have a 94 pete with a series 60 detroit in it and the speedo is off .It seems the faster you go the more its off the wierd part is when you let off the accelerator the speedo jumps up to the right speed or close to it. the cruise control also just keeps speeding up when you set it . I have called peterbilt and the dip switches on the back of the speedo are set right .The transmission , rear ends ., and the tire size are all factory. Thinking this is a wiring problem maybe a ground but just not sure where to start! also have changed the sending units and the speedometer.Any ideas would be great!!!! Thanks | |
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peterbilt speedometer off
