How to wire a factory towbar harness on a 2011 Toyota Corolla ZRE152R
Here’s how I wired a factory Toyota towbar that I got from a wrecker. It needed to interface to the brown connector in the photos below, plus it needed to be connected to earth and power and it needed to be connected to the right indicator which was across the other side of the car. There were two wires I left disconnected (see below).
I could not find a good description of this anywhere on the web and it took me a while to work it out so here it is in case anyone else is having the same problem!
The brown connector comes off and it’s pretty obvious that the wiring harness connector plug into both parts that you just unplugged. It’s not so obvious which way round it goes. The white connector on the end has two blue wires going into the bottom and this corresponds to the fat blue wire on the bottom right of the black connector on the right.
This is a really Blurry photo of the earth connector that just gets bolted onto the chassis!
This is the electronic module, it sits in the back rear corner and bolts onto the sheet metal there.
I wasn’t sure where to connect that long green wire with the black stripe. It turns out that you have to run it right across the other side of the boot and it splices onto the blue wire which is the signal wire for the right driver’s side indicator. (I soldered this and then taped it).
I’m not sure what this blue wire is but I found this on a forum : “The blue wire that is taped back is the signal wire used when a electronic trailer brake control unit is fitted.” which makes sense. It seems to works fine with it disconnected like this but my trailer does not have electronic breaks.
Another connector that I could not work out where it goes so it is disconnected. My guess is that it is a spare earth wire for something else to plug into if needed.
There is a long orange wire that needs to come right up through the front engine wall and via a fuse to the battery. I had to extend it to make it reach.
This is the other brown connector the reverse connector of the first photo. The hardest thing was working out which way these connectors went but you can see from this photo that the thin white wire on the bottom left corresponds to the fat white wire on the bottom right, and the two blue wires coming in on the top left correspond to the blue wire on the top right.
4 thoughts on “How to wire a factory towbar harness on a 2011 Toyota Corolla ZRE152R”
Just wondering what size inline fuse is used for the Orange wire to the Battery
Just wondering what size inline fuse is used for the Orange wire to the Battery
Doesn’t need to be big, I think I used 10A. It’s just to drive the lights.
WHERE are those 2 brown connectors in first and last photo located?
Boot? In the front on the driver side? Engine bay???
At the rear of the boot, near the back brake lights, one on each side.