IB9 Wiring Harness Check (Air Compressor Relay)

^ Remove air compressor relay from its vehicle wiring harness connector.

^ Did air compressor stop running and remain off?

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

NO -- SERVICE short to B+ in Circuit 417 which is causing air compressor to run until air compressors internal thermal circuit breaker is tripped. REPEAT Service Bay Diagnostics after service is made and the air compressor relay has been installed again.