IA11 Checking Wiring Harness

^ The next step in determining why the air suspension control could not activate the air compressor is:

^ Disconnect air compressor assembly electrical connector from vehicle wiring harness connector.

^ Using a voltmeter, connect positive lead to Circuit 417 of air compressor vehicle wiring harness connector and negative lead to Circuit 430F.

^ Does voltage reading fluctuate between zero and battery voltage (Check is to be made over a one minute time period)?

YES -- REPLACE air compressor assembly. REPEAT Service Bay Diagnostics. Reading and Clearing Diagnostic Trouble Codes

NO -- GO to IA12.