Owners of the 2007 Cadillac Escalade, Chevrolet Tahoe and GMC Yukon may have questions about how to connect an electric trailer brake controller, or where the brake controller pigtail harness is located.
Starting with the all-new 2007 full-size utilities, there is no longer an electric trailer brake controller pigtail harness. The trailer brake controller wiring is now part of the I/P wiring harness, and the four blunt cut wires are located under the left IP.
Wire Color | Circuit | Description | SI Document Number |
Red/Black | 242 | 12 V Power Supply | 1706194 |
Dark Blue | 47 | Trailer Brake | Not Shown |
White | 22 | Ground | 1706250 |
Light Blue/White | 6311 | Stop Light Input | 1706473 |
TIP:Â The red/black circuit 242 must be connected to Stud 1 (30 amp) of the UBEC. The wire is located between the left fender and the UBEC. Do not confuse this circuit with 742 (document 1706194) which is also red/black, and which is taped to the harness under the master cylinder. Circuit 742 is the 12 V supply to the 7 way trailer connector.
- Thanks to Jim Will
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