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Trailer Wiring Harness Installation - 2006 Toyota Tacoma

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How to Install a Trailer Wiring Harness on a 2006 Toyota Tacoma


Today on this 2006 Toyota Tacoma we are going to be installing wiring harness part number 118496. First go ahead and lower the tailgate. Starting over here on the driver side, if you look on the inboard side of the bed, you can see we have a screw at the top and a screw here at the bottom. We need to go ahead and remove those to remove the taillight. With those two screws removed, we just want to take and kind of gently rock the taillight assembly back and forth. With the taillight pulled off, if you look on the backside here, you can see the main connector and that is the connector we are going to separate and plug our harness inline to. If you look towards the midline of the connector, you can see there is a little push button right there. If we press that in and pull away, we can separate the two pieces. I am just going to go ahead and set the taillight off to the side for a second. 0:50

Go ahead and take our wiring harness. We will start installing it. You will notice on the harness we have two different sets of connectors here, one that contains the yellow and brown wires and one that contains the green and red wires. The one with the green and red goes to the passenger side. The one with the yellow and brown goes here with the driver side. We are going to need to get this connector and the 4-pole as well under the vehicle. Follow the wiring harness on the driver side here back. There is a hole. We are going to those through that hole. OK, the next thing we are going to do is take the convertor box here and if you look on the back side, we have some double sided tape to help hold it and adhere it to place. If we go into where the back side of the taillight was sitting, right here on the inboard side there is a nice flat surface that we can go ahead and adhere that to. As you can see, this one is pretty dirty so we are going to go ahead and clean that surface off first to insure that it adhere properly. Go ahead and peel off the double sided tape. And just adhere that just like so. 2:14

We will stop there for a second and do the same thing with the 4-pole end. With the 4-pole, we are just going to take it to the middle of the vehicle and you can either mount it with the mounting bracket or I am just going to tie it off here at the trailer hitch. And I am just going to take the excess wire and go ahead and zip-tie it to this main wire lead coming across here. OK, we will now go ahead and go back up to the passenger side light and plug our harness inline. Then just go ahead and put the taillight back on, just like we did on the driver side. And then with the passenger side taillight put back on, go ahead and close your tailgate and your installation will be complete. That will conclude the installation of wiring harness part number 118496 on a 2006 Toyota Tacoma.

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Info for this part was:

Employee Andrew K
Video Edited:
Andrew K
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Video by:
Kathleen M
Employee Chris R
Video by:
Chris R
Employee Aidan B
Video by:
Aidan B
Employee Cole B
Installed by:
Cole B
Employee Randy B
Test Fit:
Randy B
Employee Brent H
Test Fit:
Brent H
Employee Robert C
Test Fit:
Robert C
Employee Ryan G
Test Fit:
Ryan G

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