Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSJEEP2008LIBERTY SPORT, RWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 233 (DTCS B163C TO B2112 (TIPM))B1786-STOP LAMP CONTROL CIRCUIT OPENDIAGNOSTIC TEST

2008 Jeep Liberty Sport, RWD, Standard

Diagnostic Test

2008 Jeep Liberty Sport, RWD, StandardSECTION Diagnostic Test

WARNING: This page is about a different car, the 2009 Jeep Patriot and 2009 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all TIPM DTCs.
3. Turn the Stop Lamps on.
4. With the scan tool read the DTC information.
  Does the scan tool read: B1786-STOP LAMP CONTROL CIRCUIT OPEN?
  
  Yes
  - Go to step 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 the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
STOP LAMP BULBS
1. Turn the ignition off.
2. Inspect the Left and Right Stop Lamp Bulb Assemblies.
  Are the inoperative bulbs OK?
  
  Yes
  - Go to step 3
  No
  - Replace the Inoperative bulb or bulbs in accordance with the service information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
(L55) STOP LAMP CONTROL CIRCUIT OPEN

Fig 1: Checking Stop Lamp Control Circuit For Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the TIPM C3 harness connector.
3. Disconnect the Left and Right Stop Lamp harness connectors.
4. Measure the resistance of the (L55) Stop Lamp Control circuit.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (L55) Stop Lamp Control circuit for an open condition.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Replace the Totally Integrated Power Module (TIPM) in accordance with the service information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.