Installing Trailer Wiring Harness In 2007 Toyota Corolla

In this DIY video I show how to wired in a Reese converter box to convert from 5 wires on the car (due to separate brake lights and turn signals) to 4 wires on the trailer (due to trailers having combined brak and turn signal filaments/bulbs).

Note: at the point in the video where I was using the tester, it properly shows the signals flashing but I must not have been pressing the brake properly since the tester in the video did not show brake lights when the audio says "you should now see both brake and signal". After viewing the video, i went back and checked and it works properly. Also, it works properly when connected to the trailer which is what counts ;)

[jeresandberg]

Only video I found that shows how to make separate brake and running light wires (from vehicle) work with standard 4 prong trailer harness.
Thanks ! 👍🏼👍🏼

[xdwboqy]

9 years later. I'm just here to say THANK YOU FOR THIS VIDEO!

[geluso]

thank you! every other trailer wire video is about attaching lights to the trailer, not the car. you just clued me in to that wire adapter box and that's absolutely they key that I need to know!! thank you

[JP-rwvz]

Dude you gave the best info on the bolts m12x 1.25 it was perfect.

[gibbyrockerhunter]

I’m glad I don’t have to think when doing this installation. You made it too easy. Thanks for your help. You rock

[kentdixon]

I know this is an older video, but just came across it, going to put a wiring harness on 2006 yaris, this should help a lot thanks for posting!!

[martineprince]

Straight to the point no fuzz really helpfull for old toyota owners and in general. Thanks a lot !

[dougoliver]

exactly what i was looking for - thanks

[mattblaster]

About to do this. thank you for making going through the proper connections. This will save me so much time

[danielyimm]

Thank you. This has been very helpful and informative.

[skinnybobmail]

hello, thank you for this very helpful video. It was a little hard to determine the 2nd and 3rd wire that you were pointing to (green/white) and (Green/black). My first attempt didnt work but I think that I did not do a good job with the wires and the T-connectors. Thanks again

[hatimy]

Nice engineering ring... thanks for the help

[thomasgellos]

I watched this vid several times dragging my knuckles around while I rapped my fat head around it

[dwormon]

Dont haul to heavy you will kill the tranny an brakes.?

[odomn]

I had to chase my threads with a tap too, but mine were m10x1.25, not m12 like he says in the video for his car.

[ethandavies]

Hi ive got a wiring harness here wich has to wires with fuses that need to be wired in to a constant power would you happen to know weres best todo this thanks

[mabast]

You only hook up that 4 pin wiring harness at one side of the brake light? not both.

[SeriousSchitt]

5 to 4? I've never heard of it. So (after reading your comments in the description) you're saying that the brake and turn lights use the same filaments? How does that work then, if you're slowing down to make a right turn, then your right hand brake light will flash completely on and off, is that how it works? Thanks.

[Bretbreteux]

good job where did you get the blue connectors ???

[Lilmiket]

what are those splicing clips you used? the ones at autozone aren't working for me. I tried about 8 times and only one of them made a connection.