BA10 Wiring Harness/STO Open Circuit Check

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

^ Is ohmmeter reading less than 5 ohms?

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

NO -- No SERVICE open in STO Circuit 419A/419B.