Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Towing Recognition Control Module, Vehicle Electrical System Control Module, Special Purpose Vehicle Interface Control Module
J345
Towing Recognition Control Module
J519
Vehicle Electrical System Control Module
J1220
Special Purpose Vehicle Interface Control Module
T2a
2-Pin Connector, Black
T2b
2-Pin Connector, Black
T10ae
10-Pin Connector, Black
T40b
40-Pin Connector, Black
T92b
92-Pin Connector, White
TAHLS
Trailer Wiring Harness Coupling Point
B1061
CAN Bus 1, J1274 High Connection 2 (in Main Wiring Harness)
B1062
CAN Bus 1, J1274 Low Connection 2 (in Main Wiring Harness)
B1065
CAN Bus 1, J519 High Connection 1 (in Main Wiring Harness)
B1066
CAN Bus 1, J519 Low Connection 1 (in Main Wiring Harness)
B1067
CAN Bus 2, J519 High Connection 1 (in Main Wiring Harness)
B1068
CAN Bus 2, J519 Low Connection 1 (in Main Wiring Harness)
*
Refer to the Wiring Diagram for Trailer Towing
*2
For Vehicles with Trailer Setup
*3
Only Applies to Special Purpose Vehicles
*4
Refer to Applicable Special Purpose Vehicle Wiring Diagram
*5
For Vehicles with Trailer Socket
*6
Refer to Applicable Convenience System Wiring Diagram
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.