09-05-2020, 09:50 AM
No it’s not.
For the park brake signal, poke around under the dash. Follow the air line out of the Park brake knob. Somewhere in that line will be a pneumatically actuated switch. When the air line is pressurized to release the brakes, the switch makes. When the switch makes, the circuit is grounded. I predict you will find a wire from one side of the switch to ground, and the other going to the HWH box.
For the low pressure switch, look for a air activated switch on the rear six pack. Try unplugging it.
For the park brake signal, poke around under the dash. Follow the air line out of the Park brake knob. Somewhere in that line will be a pneumatically actuated switch. When the air line is pressurized to release the brakes, the switch makes. When the switch makes, the circuit is grounded. I predict you will find a wire from one side of the switch to ground, and the other going to the HWH box.
For the low pressure switch, look for a air activated switch on the rear six pack. Try unplugging it.
Richard and Rhonda Entrekin
95 Newell, 390 Ex caretaker
99 Newell, 512 Ex caretaker
07 Prevost Marathon, 1025
Maverick Hybrid Toad
Inverness, FL (when we're home
)