TEST
ACTION
APPLICABILITY
3
Turn the ignition off to the lock position.
Disconnect the applicable Body Control Module harness connector.
Disconnect the Headlamp Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Headlamp Switch MUX circuit from the Body Control
Module connector to the Headlamp Switch harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Headlamp Switch MUX circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn the ignition off to the lock position.
Disconnect the applicable Body Control Module harness connector.
Disconnect the Headlamp Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Headlamp Switch MUX Return circuit from the Body
Control Module connector to the Headlamp Switch harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Headlamp Switch MUX Return circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
5
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?
All
Yes
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
573
EXTERIOR LIGHTING
HEADLAMP SWITCH OPEN —
Continued