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Today we are going to be installing wiring harness 118449 on a 2009 Toyota Highlander. The first thing I want to note is once you take the harness out of the package you will have two individual pieces for the harness. The larger portion will be the harness and white plug modulite box that we are going to plug in under the dash on the left side of the brake pedal. The second part is actually going to plug in back in the rear cargo area on the right hand side underneath the paneling. We are going to hook up the larger portion first. Again we will be under the dash if you look under there just left of the brake pedal you can see a big ten pin white plug that we will plug this into. :49
We just want to plug our harness directly into that right there and then we will mount the modulite box somewhere on the underside there. Our modulite box has double sided tape on the back of it which we want to clean off the metal surface. With the modulite box taped up we just want to secure any loose wires that we might have using the cable ties that are provided in the kit. Then we will go back to the rear and connect the other part of the harness. We are in the rear cargo area of the vehicle and we are going to need to basically uninstall all of the inner portion here. So that we can gain access behind this cargo lid down below where the plug is actually located. 1:44
To do that we are going to need to remove the side cover here and the rear plate as well. Setting them off to the side as well as the passenger side cover. We need to remove the two push pins that are holding the center section in here and here. Inside the driver side cargo hatch here we want to uninstall the thumbscrews holding it in place. Then we should be able to remove the side cargo hatch here. When we do we will have to make sure we will have to manipulated around this section here because this piece does not come out. So we are going to need to pry away this edge here, like so. You can see with the hatch removed now this is my four pin connector. That is what we are going to be plugging in the remaining section of our harness into. You will push that in until you hear a click. Now we are going to figure out a routing possibility for our four pole. We can either leave it inside the vehicle and route it this way or store it in this compartment here. You could also bring it outside the vehicle there is a knockout here in this bottom section. You can slit a hole in there and run your 4 pole down through there below the vehicle. I will take my last cable tie and just tie this to the harness. Feeding it towards the center section of the vehicle. Then we are just going to route it along right here. That area right there should allow me to reinstall the cargo area and not damage the wire. Then we will go ahead and put that back into place now. Now you can see the cargo piece back in place the wire feeds nicely through. That will allow us to store it in the center section here when not in use. As you can see now that it is stored in the rear you can just pull it out the back hatch when you want to go ahead and use it. You dont have any fear of ping the hatch on it because the weather strip right here will help protect the wire from being pinched. Once again if you are not using it then you can just store it inside the vehicle inside the center compartment. 4:40
Now we are under to hood. Over here on the drivers side, right by the battery is the fuse location. WE are going to go ahead and remove the lid and you want to check with your owners manual, or on some of the newer models they are actually listed here on the backside. You want to find the location that is marked Towing and our 10 amp fuse there. You will note that on the top of the lead it states to use a 30 amp fuse for the towing location, but for our purposed we only need the 10 amp fuse. And with the fuse installed our installation is complete. This will conclude the installation of wiring harness part number 118449 on a 2009 Toyota Highlander.