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 MANUALSDODGE AND RAM2024PROMASTER 3500 BASE, CUTAWAYREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 11 (BODY CONTROL MODULE (BCM) - DTCS B104B-11 TO B1078-15)DTC TROUBLESHOOTINGB1054-23 COLUMN SWITCH MODULE (CSM) WASHER COMMANDS - SIGNAL STUCK LOWDIAGNOSTIC TEST

2024 Dodge and Ram ProMaster 3500 Base, Cutaway

Diagnostic Test

2024 Dodge and Ram ProMaster 3500 Base, CutawaySECTION Diagnostic Test

WARNING: This page is about a different car, the 2024 RAM ProMaster EV. However, it is still accessible from the selected car via links, so may be relevant.

READ AND RECORD DTCS AND ENVIRONMENTAL DATA
NOTE: CLEARING THE DTC AFTER A REPAIR - Perform after a wiring repair or component replacement:
To erase the DTC from the Body Control Module (BCM), the BCM must detect an ignition ON/OFF/ON cycle, making sure the Power Accessory Delay (PAD) is deactivated (driver door opened) after the ignition transitions to the OFF position, along with the normal operation of the system that is associated with this DTC.
1. Turn the ignition on.
2. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
3. With the scan tool, run a vehicle Scan Report, or record the Environmental Data related to the DTCs.
4. With the scan tool, read Body Control Module (BCM) DTCs.
  Is the DTC Active?
  
  Yes
  - Go To Next Step.
  No
  - Perform the appropriate INTERMITTENT CONDITION diagnostic procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE WASHER SWITCH FOR AN INTERNAL SHORT
1. Turn the ignition off.
2. Disconnect the Washer Switch harness connector.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
6. With the scan tool, read BCM DTCs.
  Did the DTC return?
  
  Yes
  - Go To Next Step.
  No
  - Replace the faulty Washer Switch (integral to the Clockspring) in accordance with the Service Information. Refer to CLOCKSPRING, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (W23) HEADLAMP WASHER RELAY OUTPUT CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the related BCM harness connector.
3. Check for continuity between ground and the Headlamp Washer Relay Output circuit at the related BCM harness connector.
  Is there continuity between ground and the Headlamp Washer Relay Output circuit?
  
  Yes
  - Repair the short to ground on the Headlamp Washer Relay Output circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To Next Step.
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all BCM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Connect all BCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read BCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.

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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.