Complaint 2185423

Complaint Summary

ELECTRICAL SYSTEM

Owner Narrative

Vehicle produced symptoms over time: Loss of Ford Pass connectivity, Inconsistent turn signal function, occasional dashboard alarm for Open Driver Door while driving, unwarranted security alarm triggers when still at home. Second to last incident was an unwarranted security alarm that triggered, and was unable to be stopped by use of the security controls (lock/unlock, alarm key button). Horn "wore out" as if fuse burned. Disconnected battery to stop. Two days later, after reconnecting the battery I drove the vehicle, Horn was not functional, and I was unable to stop the engine. Once started, the vehicle did not turn off, even with key completely removed from ignition switch. This was repeatable, every ignition cycle, thereafter. I drove to the dealer, that morning. The dealer mechanic was required to shut off the engine. Dealer mechanic diagnosed failed Battery Junction Box. After Repair, Mechanic diagnosed faulty Body Control Module. Dealer mechanic also recommended replacement of full "Main" wiring harness, interconnecting the two. The cause for all failures was corrosion and electrical shorts due to water ingress. I am aware Ford has issued numerous TSBs and recalls for faulty BCMs, in the same age range as this vehicle. Also, TSBs for water intrusion into the BCM. The mechanic took photos of corrosion on both the BCM and main wiring harness. My prior vehicle was a 2011 Ford F-150, with the same 6.2L engine. No such faults were experienced up to Nov. 2023 sale. Photos of the corrosion on main wiring harness and BCM attached. Dealer has possession of the vehicle. Repairs in progress. Ford has declined support for faulty components; Recalls not associated with this vehicle. Estimated repairs to date on 6 year old vehicle on critical electronics in excess of $7,000.

Owner-submitted narrative on file with NHTSA. Complaint narratives are self-reported and have not been verified.