DTC B1540-13: Electrically Deployable Towbar Speaker - Circuit open: Action

NOTE: This DTC does not indicate whether a speaker short is present

Check the security and integrity of the deployable towbar speaker circuit connectors and rectify as required
Check the deployable towbar speaker for damage and rectify as required
Refer to the appropriate system wiring diagrams and check the deployable towbar speaker circuit for open circuit, high resistance (nominal resistance 4 ohms). Repair circuit as required, clear DTC and retest