Dead Door Locks Plague Dodge ProMaster, Fix Needed

Had the same problem on my 2017 Dodge Ram 1500 when the keyless entry system completely failed. The central locking mechanism stopped responding, similar to your symptoms. The security system would occasionally trigger without reason. The issue was traced to a faulty Body Control Module (BCM) connector where several pins had corroded. The car alarm would sometimes activate because the BCM was getting intermittent signals. This required removing the BCM, cleaning all connection points, and reseating the main wiring harness. This is a serious repair since the BCM controls multiple vehicle functions beyond just the locking mechanism. The job requires specialized diagnostic equipment to properly reset the security system and reprogram the key fobs after repair. A good test is to try manually locking/unlocking all doors with the physical key. If they work manually but not electronically, it typically points to either the BCM connection issue or a failed door lock actuator. Given the age and mileage of your ProMaster, the BCM connector is the more likely culprit. Would recommend finding a shop that specializes in automotive electrical systems rather than a general mechanic for this type of repair.

Thanks for sharing your experience with the BCM connector issue. The symptoms you described match exactly what Im experiencing with my ProMaster central locking system. My key fob has become completely unresponsive and the security system acts up occasionally. Do you remember roughly how much you paid for the BCM connector repair? Also, have you had any car locks or electronic issues since getting it fixed? Planning to take it to an electrical specialist as you suggested, but want to have a ballpark figure in mind.

Great news, got the central locking fixed last week at an electrical specialist. The issue turned out to be simpler than the BCM problem I initially suspected. They found a damaged cable connection near the fuse box that was interrupting the door lock signals. Total repair cost was 95€, which included diagnostics and fixing the faulty wiring. The car locks are now working perfectly, both the keyless entry and key fob function as they should. No more unusual security system triggers either. The repair has held up well with daily use. This was much less expensive than a full BCM repair would have been. Sometimes these central locking problems can be resolved by finding and fixing basic wiring issues rather than replacing major components. In your case, since the symptoms are so similar, it might be worth having them check the wiring connections first before assuming its a more complex BCM problem. The specialist shop had the right diagnostic tools to pinpoint the exact issue rather than just guessing. Would suggest requesting they do a full electrical system scan to identify any other potential problems while theyre at it.

Thanks for the helpful replies everyone. Finally got my ProMaster fixed and wanted to share the outcome. Took it to an electrical specialist who diagnosed a fault in the remote locking system. There was a corroded wire harness affecting the central locking mechanism. The repair involved replacing the damaged wiring and cleaning the connections. Total cost came to 280€ including diagnostics. More than the basic wiring fix mentioned above, but still better than replacing the entire BCM. All door locks are now responding normally. The key fob works perfectly and the security system is behaving as it should. No unusual alarms or issues since the repair was completed two weeks ago. Really glad I followed the advice to use an electrical specialist rather than a general mechanic. They had the right diagnostic equipment and found the actual problem quickly instead of just guessing. Would definitely recommend this route to anyone facing similar car locks issues.