All 2017 f-super duty vehicles equipped with a factory trailer brake controller (tbc) utilize a trailer...

Bulletin number

SSM 46257

Component

Service brakes

Summary

All 2017 f-super duty vehicles equipped with a factory trailer brake controller (tbc) utilize a trailer module (trm) which initiates the trailer charging system. For trailer charging to operate, the trm must detect a trailer is connected and a brake pedal input before charging will be present at the trailer connector. Adding the trailer battery charge relay and fuse into the battery junction box are not required to operate trailer charging with a trm. If testing of the trailer charging system is required without a trailer, refer to the updated diagnostics and system operation found in the online workshop manual (wsm), section 417-01 exterior lighting.

Owners of these vehicles have filed 30 complaints in the brakes category.