Symptom:
*HIGH BEAM HEADLAMPS WILL NOT TURN ON
POSSIBLE CAUSES
HIGH BEAM SWITCH OUTPUT CIRCUIT SHORT TO GROUND
MULTIFUNCTION SWITCH
CENTRAL TIMER MODULE
HIGH BEAM DRIVER CIRCUIT
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the Multifunction Switch harness connector.
Turn the headlamps on.
Measure the resistance of the High Beam Switch Output Circuit to ground.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the High Beam Switch Output Circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Go To
2
2
Turn the ignition off.
Disconnect the Multifunction Switch harness connector.
Turn the headlamps on.
Connect a jumper wire between the Headlamp Switch Sense Circuit and the High
Beam Switch Output Circuit of the Multifunction Switch harness connector.
Do the High Beam Lamps turn on?
All
Yes
→
Replace the Multifunction Switch.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Go To
3
3
Turn the ignition off.
Disconnect the Central Timer Module harness connector.
Turn the High Beams Lamps on.
Connect a jumper wire between the High Beam Switch Output Circuit of the Central
Timer Module harness connector and each of the High Beam Driver Circuits.
Do any of the High Beam Lamps turn on?
All
Yes
→
Replace the Central Timer Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Repair the applicable High Beam Driver Circuit.
Perform BODY VERIFICATION TEST - VER 1.
181
EXTERIOR LIGHTING