IC12 Checking Wiring Harness (Suspension Down)
^ Depress STAR test button so that it remains in the down TEST position.
^ Remove air compressor relay from its vehicle wiring harness connector.
^ Using an analog ohmmeter, connect one lead to Circuit 417 of the air compressor relay connector and other lead to Circuit 417 of the air compressor vehicle wiring harness connector.
^ Is ohmmeter reading greater than 5 ohms?
YES -- SERVICE open in Circuit 417. REPEAT Service Bay Diagnostics. Reading and Clearing Diagnostic Trouble Codes
NO -- GO to IC13.