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Roadmaster Tow Bar Wiring Kit Installation - 2012 Buick Enclave

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How to Install the Roadmaster Tow Bar Wiring Kit on a 2012 Buick Enclave


Today on the 2012 Buick Enclave, we'll be installing the Road Master Universal High Powered Diode Wiring Kit, part number RM-154. We'll begin here at the rear of the vehicle, as we'll go ahead and raise the rear hatch up, we're going to need to remove each of the tail light assemblies. We'll go ahead and pull these 2 little black tabs up using a small flat head screwdriver and then underneath, there will be a screw underneath each cover. Go ahead and remove each of the 2 screws. Then, we can gently pull out on a tail light assembly. We'll need to disconnect the factory wiring from the back side.

To do this, we'll simply push in on the locking tab and gently pull the connection apart. Now, that we have the driver side tail light assembly out, we'll go ahead and repeat the same process over here on the passenger side. Next, we're going to go ahead and take the long section of wire that comes with the kit. We'll go ahead and cut one of the ends off the long section of wiring. We'll go ahead and feed the end of the wire that had the 4 flat just cut off through the lower fascia on the grille. We'll then pull the wire down underneath the vehicle.

We'll go ahead and route our wire to the back of the vehicle being careful to stay away from any moving parts, areas that may have sharp edges or areas that may become hot as these could all damage the wire. We notice that there was an area that had a sharp edge. We're going to go ahead and use a small section of the wire loom that comes with the kit. Go ahead and use some electrical tape to secure the wire loom to the 4 flat wiring, using several zip ties along the way to help secure the wiring. Now, that we're back here near the rear exhaust on the driver side, we're going to again use the section of the wire loom that comes with the kit to give the wire a little extra protection. We'll also have to use a loom clamp which is part number A0500 to help secure the wiring as we route it up behind the rear bumper fascia.

To secure the wire loom clamp to the frame of the vehicle, we'll be using a self tapping screw, part number FA1131822. Now, before we pull our wires up into the driver side tail light assembly area, we're going to go ahead and snip the green wire just at the very end so we can peel it back from the other 3 wires. This way, we'll have a continuous wire from the front of the vehicle over to the passenger side. Now, we'll go ahead and use an old section of air line tubing to pull the white, the brown and the yellow wire up into the tail light area. We'll leave the green wire out for now. Now, before we can make any connections, we need to go ahead and figure out which factory wires do which functions at the tail light.

We'll go ahead and have someone run through our light functions while we use our tester. Here, on the driver side with the running lights on, the purple wire is the connection that we'll need to make. For the brake and turn, it will be the yellow wire. Now, we'll go over and test the passenger side. Again, we'll turn the running lights on and this time, it's the brown wire with the white stripe. For the brake and turn on the passenger side, we'll be tying in with the green wire. Let's take a look at how the diodes will look on each side. You'll notice that there is 2 ins and only 1 out on each diode. Over on the passenger side, we'll use the 2 diodes that have 2 blue ins and 1 blue out. Over on the driver side, we'll use one diode that has 2 blue ins and 1 blue out but the other one will have 1 blue in and 1 yellow in. Now, we need to go ahead and strip some wires back over here on the driver side. We'll go ahead and peel the brown and the yellow wire apart as well as the white wire. We'll go ahead and strip the brown and the yellow wire back a little bit. We'll go ahead and feed an extra piece of brown wire down behind the bumper cover here. We'll go ahead and strip the end of it and twist it in with our other brown wire that we just stripped. Next, we'll go ahead and add in our spade connectors. To the 2 brown wires, we'll add the yellow spade connector and to the yellow wire, we'll add a blue spade connector. Now, we'll go ahead and strip back the end of the white wire which is the ground. We'll add our ring terminal in to the end and then we'll attach it to an area of doubled up sheet metal using a self tapping screw. Now, we need to peel back some tape, just securing the factory wiring. We'll go ahead and cut the yellow wire from the factory wiring harness. We'll add a blue spade connector to both sides. We'll take the first diode. We'll go ahead and plug the yellow wire off the four flat to the one side of the double prong. We'll go ahead and connect the yellow wiring that's closest to the socket outlet or the connection that we disconnected, we need to make sure that that side goes on the "out" on the diode. We'll go ahead and cut the purple wire as well. Again, add a blue spade connector to both sides of the wire. Next, we'll go ahead and take the next diode so that purple wire will go on the inside. The 2 brown wires with the yellow spade connector will go on an "in" marking for the diode and the purple wire closest to the connector that we disconnected, will go on the outside. Now, that we have the diode installed in the running light circuit, we'll go ahead and take some electrical tape around each of the connections, just to seal things off a little bit better. Now, that we have our connections taped, we're going to go ahead and use some electrical tape to tape the 2 diodes together, to keep them from moving around. Now, that our diodes are taped together, we can make the factory connection on the back side of the light assembly. Now, we'll go ahead and put our tail light assembly back into position and then we can put each of the screws back in, followed by putting the plastic covers back in as well. Now, we noticed that the brown wire running over to the passenger side was going to come up just a little bit short so we went ahead and added a little more wire to our brown wire. We did this using a butt connector which is part number DW05714. We're going to ahead and tape the 2 wires together. Now, if you don't have any additional wiring, you could use the extra yellow or white wire that you've snipped off from over here on the driver side. Just to make things a little more simple, we went ahead and use the piece of brown wire so that when we made our connections on the passenger side, it wouldn't be so confusing. We'll then go ahead and feed the brown and green wire through the bumper structure over to the passenger side. We'll use an old section of air line tubing to help us do this. Once the wires are pulled over to the passenger side, we'll again use an old section of air line tubing to help us routed up into the light assembly area. We can then snip our brown and green wire to the proper length. We'll then add our blue spade connectors to each end and then, we'll need to peel back the tape on the factory wiring harness. We'll need to cut the green wire in half and add a blue spade connector to each side, as well as the brown wire with the white stripe. Again, adding a blue spade connector to each side. Once we have all our spade connectors on, we'll go ahead and put a little electrical tape on each one and then we're ready to connect the wires to the diodes. We're going to take the green wire closest to the connector that goes in the back side of the light assembly and put it on the "out" arrow on one of our diodes. We'll then take the other 2 green wires and plug them on the side that reads "in". We'll take the brown wire with the white stripe, again, closest to the connector and put that on the "out" of the other diode. We'll then take the other end of the brown wire with the white stripe. We'll put that on the "in" mark of the diode as well as the brown wire we ran over from the driver side. Now that we have all of our connections on the diodes, we'll go ahead and use some electrical tape to secure them, then we can make our connection to the back of the tail light assembly and finally, we can put our tail light assembly back into position. We can put the screws back in place as well. Once you have your wire run from the front of the vehicle to the back, and you have all your zip ties securing it off, you can go ahead and take a pair of snips and trim off any excess zip tie. Finally, up here at the front of the vehicle, we'll go ahead and add a zip tie to secure the 4 flat whose going through the lower fascia of the grille. With that, that will conclude our installation of the Road Master Universal High Powered Diode Wiring Kit, part number RM-154 on our 2012 Buick Enclave. .

Info for this part was:

Test Fit:
Joe V
Video Edited:
Zack K
Video by:
Andrew K
Video Edited:
Joshua S
Test Fit:
Nicholas E
Video Edited:
Jacob T
Test Fit:
Rick A
Video Edited:
Andrew L
Video Edited:
Kathleen M
Video Edited:
Mike H
Video Edited:
Dustin K
Installed by:
Cole B
Test Fit:
Shane T
Video by:
Alan C
Video Edited:
Sue W
Test Fit:
Randy B
Video Edited:
Chris R
Test Fit:
Jared G
Video by:
Zach D
Test Fit:
Andrew S
Test Fit:
Brent H
Test Fit:
Shane H
Test Fit:
Robert C

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