Pinpoint Test D : The Message Center Does Not Agree With Actual Trailer Connection: Notes

WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

The message center displays TRAILER CONNECTED message when no trailer is connected to the vehicle

Refer to Trailer/Camper Adapter for schematic and connector information.

Normal Operations and Fault Conditions

The TBM receives information from the ABS module over the HS-CAN. If there is a concern in the ABS module preventing this information from being sent to the TBM, the TBM enters a limited operating mode.

Both the TBM and the TRM use trailer connectivity to monitor system. The TBM looks at the trailer brake circuit and the TRM looks at the lighting circuit. For TRM issues refer to REFER to: TRAILER LAMPS .

Possible Sources

Wiring, terminals or connectors
TBM
TRM

Visual Inspection and Diagnostic Pre-checks

Trailer without trailer brakes will not be detected in message center.
Electric over hydraulic type trailer brakes disables the inductance test from TBM, make sure the
Trailer Brake Type in the message center matches the customers trailer.