FA4 Checking Wiring Harness

^ Turn air suspension switch to OFF position.

^ Disconnect air suspension control module connector.

^ Using an ohmmeter, connect one lead to air suspension control module wiring harness connector Pin 22 (Circuit 431B) and other to circuit 431C of right front height sensor vehicle wiring harness connector.

^ Is ohmmeter reading less than 5 ohms?

YES -- TURN air suspension switch to OFF position. REPLACE air suspension control module. RECONNECT right front height sensor. REPEAT Service Bay Diagnostics. Reading and Clearing Diagnostic Trouble Codes

NO -- Right front height sensor power supply Circuit 431B/431C resistance is above acceptable limits. Resistance to ground should always be less than 5 ohms. RECONNECT right front height sensor and REPEAT Service Bay Diagnostics after service is made.