I was suspicious that my PacBrake wasn't working so I removed it and it was seized tight. After heating and pounding I got it free and lubed it up with the PacBrake lubricant and it works when I put a...
I ran a wire from 12 Volts to a switch and to the PacBrake solenoid so I could test the PacBrake operation any time I was in the engine compartment. You might think about doing that.