AA10 Wiring Harness/STO Open Circuit Check

^ Using an analog ohmmeter, place one lead in the wiring harness connector (for air control module) Pin 15 (Circuit 419A) and the other to the wiring harness connector (for STAR Tester) Pin 4 (Circuit 419B).

^ Is ohmmeter reading less than five ohms?

YES -- TURN air suspension switch to OFF position. REPLACE the air suspension control module and CONNECT to vehicle wiring harness.

NO -- SERVICE open in STO Circuit 419A/419B. REPEAT Service Bay Diagnostics. Reading and Clearing Diagnostic Trouble Codes