Jeep Wrangler TJ. Manual — part 39
Symptom:
*BRAKE WARNING INDICATOR INOPERATIVE
POSSIBLE CAUSES
BRAKE WARNING INDICATOR CIRCUIT SHORT TO VOLTAGE
BRAKE WARNING INDICATOR CIRCUIT OPEN
BRAKE WARNING INDICATOR SWITCH
PARK BRAKE SWITCH
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Perform the Instrument Cluster Self Test.
Did the Brake Warning Indicator illuminate during the Self Test?
All
Yes
→ Go To 2
No
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Instrument Cluster C2 harness connector.
Check connectors - Clean/repair as necessary.
Measure the voltage between the Brake Warning Indicator circuit and ground.
Is there any voltage present?
All
Yes
→ Repair the Brake Warning Indicator circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
NOTE: Ensure that the Instrument Cluster harness connector is connected.
Turn the ignition off.
Disconnect the Brake Warning Indicator Switch (Pressure Switch) harness connec-
tor.
Connect a jumper wire between cavity 1 and cavity 2.
Disconnect the Park Brake Switch harness connector.
Connect a jumper wire between the Brake Warning Indicator circuit and ground.
Turn the ignition on and observe the Brake Warning Indicator.
Does the Brake Warning Indicator illuminate?
All
Yes
→ Replace the Park Brake Switch in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
153
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the Instrument Cluster C2 harness connector.
Disconnect the Park Brake Switch harness connector.
Disconnect the Brake Warning Indicator Switch harness connector.
Connect a jumper wire between cavity 1 and cavity 2.
Measure the resistance of the Brake Warning Indicator circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Brake Warning Indicator Switch in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Brake Warning Indicator circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
154
INSTRUMENT CLUSTER
*BRAKE WARNING INDICATOR INOPERATIVE —
Continued
Symptom:
*FOG LAMP INDICATOR INOPERATIVE - DOMESTIC
POSSIBLE CAUSES
FOG LAMP INDICATOR CIRCUIT OPEN
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
NOTE: Ensure that the Fog Lamps operate properly. If not, refer to EXTE-
RIOR LIGHTING in the Service Information.
NOTE: The Headlamps must be on Low Beam for indicator to operate.
Turn the ignition off.
Disconnect the Instrument Cluster.
Check connectors - Clean/repair as necessary.
Turn the Headlamps on and actuate the Fog Lamps.
Using a 12-volt test light connected to ground, check the Fog Lamp Indicator circuit.
Does the test light illuminate brightly?
All
Yes
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Fog Lamp Indicator circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
155
INSTRUMENT CLUSTER
Symptom:
*HIGH BEAM INDICATOR INOPERATIVE
POSSIBLE CAUSES
HIGH BEAM INDICATOR CIRCUIT OPEN
INDICATOR BULB
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
NOTE: Ensure that the Headlamp High Beams operate properly. If not, refer
to the Exterior Lighting Service Information.
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Check connectors - Clean/repair as necessary.
Turn the Headlamps on and actuate the High Beams.
NOTE: Ensure that the Fog Lamps are not actuated (Domestic vehicles
only).
Using a 12-volt test light connected to ground, back probe the High Beam Indicator
circuit.
Does the test light illuminate brightly?
All
Yes
→ Go To 2
No
→ Repair the Dimmer Switch High Beam Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Instrument Cluster.
Check connectors - Clean/repair as necessary.
Remove and inspect the High Beam Indicator bulb.
Is the indicator bulb filament open?
All
Yes
→ Replace the High Beam Indicator Bulb in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
156
INSTRUMENT CLUSTER
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