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2011 Toyota Sequoia, Integrated Brake Controller Wiring Harness

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Member - Posts: 16
Member spacespace
Joined: December 30, 2007
Location: Florida, United States
Posted: September 13, 2021 at 8:22 PM / IP Logged Link to Post Post Reply Quote erkme73
I have an 07 Tundra and 11 Sequoia. The Tundra has a functioning brake controller (Tekonsha P3) using their adapter cable. Works fine. A new P3 works find in Tundra but not in Sequoia. I verified the two 30A fuses under hood are good. The wire colors at the factory harness are identical between both vehicles. However, on the Tundra, the 12V+ to ground is on the thick black wire. On the Sequoia, the black wire has no voltage and instead the thin green wire has 12V+ to ground.
I'm befuddled.

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Disclaimer: *All information on this site ( ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

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