Service Bulletin #11
Failure: PTO Alarm turns on by
its self, while driving in rain or slush.
Cause: The system is
detecting a phantom or false ground caused by leakage current in the signal
wire shorting to ground.
Diagnosis: Disconnecting the signal feedback wire turns off alarm.
Try disconnecting the wire at the PDC first, and then at the source (the PTO
switch) to isolate the problem to damage in the vehicles wiring harness. An inline “Butt” splice was used to extend
the PTO signal wire. Road grime and
moisture worked into small cracks or gaps in the wire connection’s insulation
producing a phantom ground.
Note; Similarly nicked insulation and frayed wires, as well
as a failing signal switch can cause similar symptoms.
Service: See Recommended Corrective Action
Recommended Corrective Action: The importance of good wiring and
installation practices cannot be over emphasized. To restore the integrity of the wiring
harness, a new and un-spliced 18 awg wire must be run from the PTO Ground
Switch to the System’s PTO -input stab.
circumstances of installation necessitate the use of an inline Butt Splice on
signal or electrical wire, or on any chassis wire were the terminal connector
is exposed to the elements, then permanent weatherproofing is required. Do NOT use electrical tape for permanent
installations. The use of Butt connectors with an integral adhesive sealant
(PowerUp Products PN 1701102) or Heat
Shrink Tubing with an integral sealant (PN 3601001 which is 1/4”d by 1” long, or PN 3601006
which is 5/16” d by 3” long) is
Power Up Products