Trailer Wiring Harness Installation - 2010 Toyota Tacoma

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How to Install a Trailer Wiring Harness on a 2010 Toyota Tacoma


Today on 2010 Toyota Tacoma we're going to install part number 118496 from Tow Ready. First thing we'll need to do is go ahead and lower tailgate and we have to remove both tail lights. There's a bolt on top and bottom light to remove and then we can go ahead and unsnap the tail light from the plastic connectors behind it. Pull down from top into bottom, rock it back and forth until it pops loose. Then we'll disconnect the wire harness push down and you can disconnect it from the tail light. We'll go ahead and put the tail light aside for now. We're done with our driver's side, let's go ahead and repeat the same process over on the passenger's side. Alright now at this point we can go ahead and start installing the wire harness.

We'll start off by taking the Four Pull end and run it through the opening beneath the tail light and behind the body work. Run that down. We'll also take a T connector with a green and red wire and run that through the same opening as well. Now I'll go ahead and locate a spot for our converter box. We'll clean up a small section of the sheet metal on the inside edge of the bed and then go ahead and attach it to the sheet metal.

Now take the T connector with the yellow wire and attach that to the factory wire harness. Now go ahead and take a ground wire and attach it to an existing stud inside. This kit does come with a nut that will go ahead and work with that stud. And then we're going to take the other half of the T connector and re-attach it to the tail light and then reattach the tail light to the truck. Next we'll go beneath the vehicle and start running our wires to the other side. We'll start with the Four Pull wire harness and run it over to the center of the hitch. Next we'll take our T connector with the green and red wire and route that over to the other side and then back up to the passenger side tail light.

We'll run it through the opening to the tail light and then we'll go ahead and attach it to the wire harness from the vehicle and then attach the other half to the tail light and once again reattach tail light to the vehicle. Alright, now go ahead and take a moment to zip our wires up and make sure they're safe and secure out of the way. Everything reattached and secured we'll go ahead and test our wire harness. We'll go ahead and take our tester and attach it to the ground wire which is white and then we'll test the brown wire which will be a running light circuit. Our left turn will be our yellow wire and our right turn will be a green wire. Our break signal will be the green and yellow wire constant. Looks like everything works and with that that will finish it for our install part number 118496 from Tow Ready on our 2010 Toyota Tacoma.

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Andrew K
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Cole B
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Randy B
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Brent H
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Robert C
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Ryan G

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