What fuse powers the tailgate lock system in this diagram?

Fuse 14, a 40 A fuse located in the Power Distribution Center, fed from the battery (A0).

What circuit and wire feed power from the fuse to the Body Control Module?

Circuit A934, a 12-gauge red (RD) wire, from pin 21 of connector C6 to pin 3 of connector C2/B (Fused B(+) input of the Body Control Module).

What are the lock and unlock driver circuits for the tailgate lock motor?

The Secondary Lock Driver is circuit P235, 18-gauge light green/tan (LG/TN) from BCM pin 42, becoming LG/DB at the motor. The Secondary Unlock Driver is circuit P237, 18-gauge dark green/tan (DG/TN) from BCM pin 41 (connector C3/E), becoming VT/LG at the motor.

Where does the Body Control Module ground in this circuit?

Through circuit Z906, an 18-gauge black (BK) wire from pin 1 of connector C3/C to ground point G107.

Which module controls the tailgate lock motor?

The Body Control Module, which provides the Secondary Lock Driver and Secondary Unlock Driver outputs to the tailgate lock motor.

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Tailgate Lock System Wiring Diagram - BCM, Fuse 14 40A, Circuits P235/P237

Tailgate lock system wiring diagram with body control module, fuse, and color-coded lock/unlock circuits

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Wiring diagram of a tailgate lock system showing the body control module, fuse, and color-coded secondary lock and unlock circuits.

AI caption January 2016 · Photo 129 of 282

This is a single-page wiring diagram titled "TAILGATE - LOCK SYSTEM" showing the electrical circuit for a power tailgate lock. Power flows from the battery (A0) through Fuse 14 (40 A) in the Power Distribution Center, then via circuit A934 (12-gauge red wire, pin 21 of connector C6) to the Fused B(+) input (pin 3, connector C2/B) of the Body Control Module. The module is grounded through circuit Z906 (18-gauge black wire, pin 1 of connector C3/C) to ground point G107. Two output circuits leave the module: the Secondary Lock Driver on circuit P235 (18-gauge light green/tan, pin 42) and the Secondary Unlock Driver on circuit P237 (18-gauge dark green/tan, pin 41, connector C3/E). Both circuits pass through several intermediate connectors (pins 1/2, 8/7, G/H, with connector references such as D20, 1530, 1531) before reaching the tailgate lock motor, where the wire colors change to P235 18 LG/DB (lock driver, pin 1) and P237 18 VT/LG (unlock driver, pin 2). A reader can learn fuse rating, circuit numbers, wire gauges and colors, connector pin assignments, and the ground location for diagnosing tailgate lock faults.

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Frequently asked questions

What fuse powers the tailgate lock system in this diagram?: Fuse 14, a 40 A fuse located in the Power Distribution Center, fed from the battery (A0).
What circuit and wire feed power from the fuse to the Body Control Module?: Circuit A934, a 12-gauge red (RD) wire, from pin 21 of connector C6 to pin 3 of connector C2/B (Fused B(+) input of the Body Control Module).
What are the lock and unlock driver circuits for the tailgate lock motor?: The Secondary Lock Driver is circuit P235, 18-gauge light green/tan (LG/TN) from BCM pin 42, becoming LG/DB at the motor. The Secondary Unlock Driver is circuit P237, 18-gauge dark green/tan (DG/TN) from BCM pin 41 (connector C3/E), becoming VT/LG at the motor.
Where does the Body Control Module ground in this circuit?: Through circuit Z906, an 18-gauge black (BK) wire from pin 1 of connector C3/C to ground point G107.
Which module controls the tailgate lock motor?: The Body Control Module, which provides the Secondary Lock Driver and Secondary Unlock Driver outputs to the tailgate lock motor.