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Trailer Wiring Harness Installation - 2012 Jeep Grand Cherokee

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Jeep Grand Cherokee Wiring



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Installation of a Trailer Wiring Harness on a 2012 Jeep Grand Cherokee


Today on our 2012 Jeep Grand Cherokee were going to install the Tow Ready T1 connector part :# 118425. First well need to access the rear cargo area of the vehicle. Well need to remove the drivers side real taillight lens assembly. There are two fasteners, there are push pin fasteners. Itll take a screwdriver to pry out the center of the fastener and then remove it. With our fasteners out well gently pry the lens assembly out away from the body of the vehicle.

Next what were going to do is disconnect the taillight connector from the lens assembly. It will be the large black connector with a red locking tab, so well unlock the locking tab pressing the connector lock and detach it from the lens assembly. Now we can take our new Tow Ready harness and plug it in line with the manufactures wiring. We will be using the yellow, brown and white wire and connectors and first well plug in and then well lock in place. The other end will go into the taillight assembly.

This plugs us in line with the manufactures wiring. The remaining wires we have is going to be a white and green wire and the 4 pole connector. These will get fed down between the bumper cover and the sheet metal of the vehicle. Alright, with our wire pulled down from underneath the vehicle well go ahead and install the drivers side taillight assembly. With the taillight assembly reinstalled well go ahead and get under the vehicle and start routing our wires.

Now, when routing our wires we want to keep them away from moving components such as the steering and such as the suspension or excessive heat such as the exhaust. To rout my white and green wire over to the passenger side Im going to feed them through in the inside of the bumper structure itself. To do this Im going to take a piece of air line or a stiff piece of wire as a wire lead to feed it through the bumper and pull it out the other side. Im going to tape my wire with a black electrical tape and just tape it to the end of my wire pole. Now well go ahead and pull it through the bumper over to the passenger side.

Alright, now that were over the passenger side with our white and green wire we can go ahead and remove the passenger side taillight assembly. Once we do that well feed our wire up behind the taillight and make the connection. To remove the passenger side taillight assembly well repeat the same process as we did on the driver side. Alright, now weve got our wire pulled up behind the taillight Ill go ahead and remove my pole wire. Well go ahead and make our connections to the taillight assembly. Now we can take our white wire with the ring terminal, this will be our ground wire, and attach it here to the body to ground our harness. Well use our self-tapping screw to run it directly into the body of the vehicle. Alright, with our ground made we can go ahead and reinstall the taillight assembly. Well go ahead and close the car door, get back underneath the vehicle and complete routing and securing our wires. Rout it up behind the bumper structure and over to our hitch. Now Ill just take some black zip ties and secure my wire. With my wire secured Ill just take my side cutters and go ahead and cut the excess from our zip ties. And that will complete the install of our Tow Ready T1 connector part #: 118425 on our 2012 Jeep Grand Cherokee.



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Video Edited:
Zack K

Video Edited:
Joshua S

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