Dodge Dakota (R1). Manual — part 46
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
→
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
→
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
Symptom:
*LOW BEAM HEADLAMPS WILL NOT TURN OFF
POSSIBLE CAUSES
HEADLAMP SWITCH OFF SENSE CIRCUIT SHORT TO GROUND
CENTRAL TIMER MODULE
HEADLAMP SWITCH
TEST
ACTION
APPLICABILITY
1
Disconnect the Headlamp Switch harness connector.
Connect a jumper wire between ground and the Headlamp Switch Off Sense Circuit
of the Headlamp Switch harness connector.
Did the Low Beam Headlamps turn off?
All
Yes
→
No
→
Repair the Headlamp Switch Off Sense Circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the Headlamp Switch to the OFF position.
Disconnect the Headlamp Switch harness connector.
Disconnect the Central Timer Module harness connector.
Measure the resistance of the Headlamp Switch Off Sense Circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Replace the Central Timer Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Replace the Headlamp Switch.
Perform BODY VERIFICATION TEST - VER 1.
182
EXTERIOR LIGHTING
Symptom:
*LOW BEAM HEADLAMPS WILL NOT TURN ON
POSSIBLE CAUSES
FUSED B+ CIRCUIT SHORT TO VOLTAGE
HEADLAMP SWITCH
HEADLAMP SWITCH SENSE CIRCUIT SHORT TO GROUND
MULTIFUNCTION SWITCH
LOW BEAM SWITCH OUTPUT CIRCUIT SHORT TO GROUND
CENTRAL TIMER MODULE
LOW BEAM DRIVER CIRCUIT SHORT TO VOLTAGE
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the Central Timer Module harness connector.
Measure the voltage of the Fused B+ Circuits of the Central Timer Module harness
connector to the PDC.
Is the voltage above 10.0 volts at any of the two circuits?
All
Yes
→
No
→
Repair the applicable Fused B+ Circuit for a short to voltage and
replace the Fuse.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the Headlamp Switch to the on position.
With the DRBIII
t, read the Headlamp Switch Voltage.
Does the DRBIII
t display voltage between 1.4 and 1.8 volts?
All
Yes
→
No
→
Replace the Headlamp Switch.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the Headlamp Switch harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance of the Headlamp Switch Sense Circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the Headlamp Switch Sense Circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
4
Disconnect the Multifunction Switch harness connector.
Turn the Headlamps on.
Connect a jumper wire between the Headlamp Switch Sense Circuit and the Low
Beam Switch Output Circuit of the Multifunction Switch harness connector.
Do the Low Beam Headlamps turn on?
All
Yes
→
Replace the Multifunction Switch.
Perform BODY VERIFICATION TEST - VER 1.
No
→
183
EXTERIOR LIGHTING
TEST
ACTION
APPLICABILITY
5
Disconnect the Multifunction Switch harness connector.
Turn the Headlamps on.
Measure the resistance of the Low Beam Switch Output Circuit to ground.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the Low Beam Switch Output Circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→
6
Disconnect the Central Timer Module harness connector.
Turn the Headlamps on.
Connect a jumper wire between the Low Beam Switch Output Circuit of the Central
Timer Module harness connector and each Low Beam Driver Circuit.
Do any of the Low Beam Headlamps turn on?
All
Yes
→
Replace the Central Timer Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Repair the applicable Low Beam Driver Circuit for a short to
voltage.
Perform BODY VERIFICATION TEST - VER 1.
184
EXTERIOR LIGHTING
*LOW BEAM HEADLAMPS WILL NOT TURN ON —
Continued
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