Trailer Brake Control Module: Locations

Wheels/Vehicle Underbody Component Views

Left Rear Frame and Underbody Components (20/30 Series)

Left Rear Frame Rail (20/30 Series):

1 - Trailer Connector (UY7)
2 - Trailer Brake Controller Module (TBCM) (JL1)
3 - Trailer Brake Controller Solid State Relay (JL1)

Right Rear Frame and Underbody Components (31 Series)

Right Rear Frame Rail (31 Series):

1 - Trailer Brake Controller Solid State Relay
2 - Trailer Brake Controller Module (TBCM)