I have a 544H the parking brake that does not want to release I’ve checked the sensor on break unit I’ve tried the switch on my dash and I’ve had no luck any recommendations
Have you tested the solenoid coil for voltage when released? Is the coil resistance correct?
I can't find an ohm spec for the PB solenoid. Check the ohms and report findings. Any codes? Transmission pressure good?
The ohm spec won't likely matter. Either the coil will have continuity or it won't.
What is your machine's serial number?