Toyota Tundra Trailer Wiring Harness Diagram Wiring Site Resource

Trailer Harness Wiring diagram and color codes.. Tundra Solutions Forum - the best community to talk, mods, price, repair and research your Toyota! Show Less . Full Forum Listing. Explore Our Forums. 2Gen-Tundra 1Gen-Tundra 1Gen-Sequoia Tacoma Engine, Intake, Exhaust, Induction.. TOYOTA TUNDRA 2007 - TRAILER WIRE HARNESS Procedure Page 5 of 31 pages Issue: C 10/11/07 2. Wiring Precautions (a) DO NOT pull on vehicle wires and/or wire harness. To uncouple electrical connectors, pull only on the connector. (Fig. 2-1) (b) Use nylon ties and adhesive foam strips to secure the vehicle harness and the trailer wire harness.

In the "3.0 Location & Routing" section, you'll find the actual locations of the connectors, ECUs, and wiring harnesses based on your truck configuration (i.e. cab type, and column vs. floor shifter). General process: 1. Find the appropriate connectors and wire for the specific function you are checking in the wiring diagram.. Mount a relay back there. Connect relay pin #87 to this battery feed, #30 to the lights (+), #85 to ground and #86 to the backup lamps circuit wire at the trailer harness plug (the plug under bed, just behind the license plate). These pin numbers refer to common Bosch automotive relay terminal markings.