Service Bulletin #13
Failure: Alarm turns on
intermittently though the PTO is not engaged.
Cause: The Power Touch system is detecting a “phantom” or false
ground caused by contact contamination internal to the PTO pressure switch.
Note: Similarly poorly sealed inline splices and or cut, cracked
or nicked insulation anywhere along the signal wire can cause similar symptoms.
Diagnosis: Disconnecting the signal feedback wire turns off alarm.
Try disconnecting the wire at the PDC first, and then at the pressure switch
(the PTO switch) to isolate the source of the fault. The switch may seem OK
when checked with a test light but when checked with a high ohm DVM it will
show an erratic resistance. This intermittent alarm condition is an early
warning indicator of imminent switch failure.
Deactivate the PTO “Engaged” (feedback) alarm and replace it with a PTO “Power”
Alarm. Inside the PDC, on the main
control board move the violet wire from the PTO -(J27) stab to the PTO+ (J25)
stab. On the J -Board move the violet
wire from the PTO-(J39)
stab to the PTO+ (J38) stab and run a wire (PowerUp Products PN
1500412) from the PTO power post (Output #3) to the PTO+ (J22) input
Recommended Corrective Action:
Replace the PTO Ground Switch ASAP.
circumstances of installation necessitate the use of an inline Butt Splice on
any signal or electrical wire, or on any chassis wire were the terminal
connector will be 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