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Home >> Ford >> 2021 >> Mustang Mach-E Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 609 (Auxiliary Brake System) >> Description And Operation >> Auxiliary Brake System - System Operation and Component Description >> System Operation >> TBM Wake Up
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TBM Wake Up

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.
NOTE: These conditions require that a trailer not be connected to the trailer tow connector.

When the manual lever is set all the way to the left, the message center should display TRAILER DISCONNECTED. At the same time, with the vehicle stationary, battery voltage should be present at pin 3 of trailer tow connector C4099.

When not braking the TBM sends a voltage pulse to pin 3 of the trailer tow connector to determine if a trailer is connected to the trailer tow connector.

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