No Power to AC Clutch 1999 4700

Hi, I think the low pressure switch only runs a relay for the clutch power. I'd check the relay and breaker.

 

Yep, rrw811 is right. The low and high pressure switches trigger the a/c clutch relay. The circuit I see has clutch power going starting at the a/c off/on switch, then it goes through the freeze switch to the relay terminal 30. Now power goes through the relay to 87a, so the clutch should get power without the relay energized. The relay is energized from the low and high pressure switches. Pressure too low and the low pressure switch closes which triggers the relay to open terminal 30 to 87a killing power to the clutch. A/C pressure too high the high pressure switch closes and does the same. Check for power to terminal 30 at the relay, no power I would say the freeze switch is the problem, which is rather common anyway. Hope this helps.

 

I think those are behind the panel in front of the pass seat?