Compressor/Pump Relay: Testing and Inspection

Fig. 8 Compressor Relay Terminal View:

A10-Compressor Relay

Connect a suitable 12 volt source to solenoid valve, then apply compressed air and check that air passes through solenoid. If air does not pass through valve, replace.

A12-Compressor Relay


Connect a suitable 12 volt source to terminal A, and ground terminal B, Fig. 8. Check that continuity exists between terminals C and D. Disconnect 12 volt source and check that no continuity exists between terminals C and D. Replace relay if continuity checks are not as specified.