My compressor clutch will not engage there is 45 pounds of pressure in the system would you please help me diagnose step by step for trouble shooting. I took the two wires off of the green pressure switch by the sight glass and connected them together but nothing. I tried all combinations on the control switch board but nothing. Any help would be greatly appreciated.

Any fuses blown? Did you check for voltage at the connections? How is the KLIMA relay?

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D