Symptom Chart(s): Notes

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .

NOTE: The customer trailer needs to be connected to the vehicle to properly diagnose a BLIS® with trailer tow system concern (if equipped).

NOTE: Rule out any base BLIS®/ CTA system concerns prior to diagnosing the BLIS® with trailer tow system (if equipped).