EL4 Wiring Harness Check

^ Turn air suspension switch to OFF position.

^ Disconnect air suspension control module connector.

^ Using an analog ohmmeter, connect one lead to air suspension control module wiring harness connector Pin 5 (Circuit 427) and other to a known good chassis ground.

^ Is ohmmeter reading grater than 10,000 ohms?

YES -- GO to EL5.

NO -- SERVICE short to ground in wiring harness circuit 427. RECONNECT rear height sensors, air suspension control module and REPEAT Service Bay Diagnostics. Reading and Clearing Diagnostic Trouble Codes