Chrysler Town, Dodge Caravan. Manual — part 801
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the inoperative rear tail lamp harness connector.
Turn the ignition on.
Engage the transmission to reverse.
Using a 12-volt test light connected to ground, check the Backup Lamps Output
circuit.
Does the test light illuminate brightly?
All
Yes
→ Replace the applicable Backup Lamp.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the Body Control Module harness connector.
Disconnect the inoperative rear tail lamp harness connector.
Measure the resistance of the Backup Lamp Driver Circuit.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Backup Lamp Driver Circuit for an open condition.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
440
EXTERIOR LIGHTING
BACKUP LAMP OUTPUT OPEN —
Continued
Symptom:
BACKUP LAMP OUTPUT SHORT
When Monitored and Set Condition:
BACKUP LAMP OUTPUT SHORT
When Monitored:
With the transmission in reverse.
Set Condition:
When voltage output status is Low.
POSSIBLE CAUSES
INTERMITTENT CONDITION
BACKUP LAMP
BACKUP LAMP DRIVER CIRCUIT SHORT TO GROUND
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all BCM DTC’s.
Place the transmission in reverse.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Backup Lamp Output Short?
All
Yes
→ Go To 2
No
→ The condition that caused the symptom is currently not present.
Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced,pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition on.
Place the transmission in reverse.
Using a 12-volt test light connected to ground, check the Backup Lamp Output
circuit.
Does the test light illuminate brightly?
All
Yes
→ Replace the Backup Lamp.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off.
Disconnect the Body Control Module harness connector.
Disconnect both rear tail lamp harness connector.
Measure the resistance of the Backup Lamp Driver circuit and ground.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Backup Lamp Driver circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
441
EXTERIOR LIGHTING
Symptom:
FRONT FOG LAMP RELAY OPEN
When Monitored and Set Condition:
FRONT FOG LAMP RELAY OPEN
When Monitored:
Ignition On.
Set Condition:
The IPM detects high current from the fog lamp relay control circuit.
POSSIBLE CAUSES
MISSING RELAY
OPEN FUSE
FOG LAMP RELAY
INTERMITTENT CONDITION
FOG LAMP RELAY CONTROL CIRCUIT OPEN
FRONT CONTROL MODULE
INTELLIGENT POWER MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all IPM DTC’s.
Turn the Fog Lamps on.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Front Fog Lamp Relay Open?
All
Yes
→ Go To 2
No
→ Go To 5
2
Turn the ignition off.
Check the IPM to make certain the Fog Lamp Relay is present.
Is the Fog Lamp Relay present?
All
Yes
→ Go To 3
No
→ Replace the missing Fog Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Install a known good relay in place of the fog lamp relay.
Turn the Fog Lamps On.
Do the Fog Lamps operate normally?
All
Yes
→ Replace the Fog Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
442
EXTERIOR LIGHTING
TEST
ACTION
APPLICABILITY
4
Turn the ignition off
Remove the Fog Lamp Relay.
Measure the voltage of the Fused B+ circuit of the fog lamp relay.
Is the voltage above 10 volts?
All
Yes
→ Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Intelligent Power Module.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Check the IPM Fog Lamp fuse #1.
Is the fuse open?
All
Yes
→ Replace the open fuse.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 6
6
Turn the ignition off.
Disconnect the Front Control Module from the IPM.
Remove the Fog Lamp Relay.
Measure the resistance of the Fog Lamp Relay Control Circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ The condition that caused the symptom is currently not present.
Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced,pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Fog Lamp Relay Control Circuit.
Perform BODY VERIFICATION TEST - VER 1.
443
EXTERIOR LIGHTING
FRONT FOG LAMP RELAY OPEN —
Continued
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