Well I could tell you if I were looking at the relay. My guess is 30 in 87 out to the compressor. The control circuit will be 86 or 85 depending whether the control is 12v or ground. The other 85 or 86 will be the complement.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician