EF6 Check Wiring Harness

^ Verify that all the wires going to air compressor relay are in proper location.

^ Are all wires in proper location?

YES -- Air compressor relay ground Circuit 430B has a resistance to chassis ground that is above acceptable limits. The resistance to ground should always be less than 2 ohms. REPEAT Service Bay Diagnostics after service is made.

NO -- RELOCATE wires to proper location. RECONNECT air compressor relay and air suspension control module. REPEAT Service Bay Diagnostics. Reading and Clearing Diagnostic Trouble Codes