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peterbilt speedometer and odometer Quit?

39K views 4 replies 4 participants last post by  mlentsch 
#1 ·
1998 379 peterbilt speedometer and odometer quit. The transmission has one sensor on the tailshaft that I pulled out and cleaned up then reinstalled, nothing changed anyone know where to go next or how to test the sensor?
Thanks for any help!!
 
#3 ·
:sprayw
there is a link in the handy links sticky, supermiller, has schematics for petes.

But a quick trouble check is with a multi meter check for power to one of the wires going to the trans sensor, if you have power there , check for power across the plug it won't be 12V more like 3 or 4 if you have that check for resistance across the sensor if none sensor is prolly bad, if you have no power to the plug check fuses , then check schematic tio find wire number, sometimes they change going thru a plug. trace till you find an open .
 
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