Truck repair facility giving up after 5 hours of diagnostics at $128/hour.
They report the wire supplying voltage to the compressor is only providing 8-9 volts which won't engage the clutch. The clutch will engage if 12v. is "hot wired" to the clutch.
one solution is to add a 6v. relay; use the 8-9v. signal to pull in a relay that switches 12v. direct from the nearby battery.
does anyone know what the correct amp draw for the compressor clutch is? it's possible the clutch solenoid is failing such that it'll still work with a supply that can provide more current (the hot wire) than the coaches internal wiring.
other comments are welcome. I'm reluctant to go to another service shop after already spending over $600 essentially for nothing.
mark in MN
They report the wire supplying voltage to the compressor is only providing 8-9 volts which won't engage the clutch. The clutch will engage if 12v. is "hot wired" to the clutch.
one solution is to add a 6v. relay; use the 8-9v. signal to pull in a relay that switches 12v. direct from the nearby battery.
does anyone know what the correct amp draw for the compressor clutch is? it's possible the clutch solenoid is failing such that it'll still work with a supply that can provide more current (the hot wire) than the coaches internal wiring.
other comments are welcome. I'm reluctant to go to another service shop after already spending over $600 essentially for nothing.
mark in MN