AC compressor not getting power

I had the same problem today. Mine was a blown fuse. I have an international though.

 

You check fuse in fuse box by clutch pedal?

 

I think that year model may have a thermostat around the evaporator. You need to make sure you have power to both sides of that when you have the A/C switched on.

 

If you had 12 volts on both sides of the OPEN thermostat, then closing the thermostats switch would do nothing. To get by in a pinch use a fused (same amperage) jumper wire to energize the electromagnetic clutch.
The Thermostat switch opens to disrupt the 12 volt power to the circuit AFTER the switch.
Using a volt meter place the probes across the switch and read for power, if the switch is open the meter will read voltage, if the thermostat switch is closed the voltmeter will not read any voltage because its just like putting both of the voltmeters probes on the Positive terminal. You need BOTH sides of power to read voltahe.
Positive leg of power and the Negative leg of power.

 

Doesn't power flow from from fan switch, to A/C function switch, to thermostat, to high pressure them low pressure to clutch?


Turn the thermostat off and on with the meter or test light in the clutch wire, that will tell the tale.


If you have power at pressure switch on both sides but not the clutch I'm thinking broke wire or bad connection at a harness connector.

 

There should be three switches on Pete. One usually on driver side around the top of radiator. One on driver side on lines near fan solenoid. And one on passenger side on lines on cab. One is low pressure, one is high pressure, and one is fan control. I can't remember which is which without looking. Wore out is right about if power is at the switches then probably harness. Time for a loadpro tool.

I have a Volvo at the shop now and they butchered the wires on it. It was an APADS system and they took the APADS pressure switches off and installed some switches off a car and they have butt connections every foot on the wiring.

 

ck fuses first but also do forget to ck for loose wires