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Retarder failure
On recent trip we heard a pop coming from the dash and then the lever on steering column was inop. Took it to Allison shop in Charlotte and after their diagnosis I was told that this lever was a dummy lever and wasn’t ever to work, DUH! I refused the bus and called Prevost who in turn called the shop and sent a wiring diagram showing the wiring and the resistor module. After looking the shop did find that this wiring had come detached from the module; maybe due to the steering wheel being tilted to its most up position.
I realize that this doesn’t happen often but just wanted to inform the group.
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