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Roadmaster Tow Bar Wiring Kit Installation - 2012 Chevrolet Malibu

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How to Install the Roadmaster Tow Bar Wiring Kit on a 2012 Chevrolet Malibu


Today on our 2012 Chevrolet Malibu we'll be installing the Roadmaster Universal Hy-Power Diode Wiring Kit, part number RM-154. To start our install we're going to take the longer of the two wires that come with the kit. We're going to go ahead and cut one of the ends off. Now, we'll go ahead and take the end that still has the 4-flat connector on it. We'll route it here through the grill where we'll zip tie it off so it stays secure while we route the rest of our wire. It's a good idea to loop or to bunch a little bit of excess wire up here at the front in case you need to ever change the front pigtail out. We're going to go ahead and add about two feet of wire just by bunching it, going back and forth, then we'll zip tie it off up here.

Next, we'll go ahead and take the other end of the wire and we'll route it to the rear of the vehicle. Now, when routing the wire, you want to make sure you stay away from any areas that may move, become hot or have sharp edges because all of these could easily damage the wire. We'll also be using several zip ties along the way to help secure our wire. Next, we're going to need to go ahead and pull the trunk lining out. We'll go ahead and set this out for now.

Then we'll need to remove this center threshold piece here. Do that by just simply pulling upward. We'll release the tabs that hold it in place. Next, we're going to need to undo . There's two plastic screws here or caps, as well as two push fasteners. We'll need to undo these on both the driver and the passenger side.

Now, to remove the push fasteners here, you can either use a trim panel removal tool or a large flat head screwdriver. Go ahead then once we have our fasteners removed and peel back the interior carper here. Now, we're going to come over here on the driver's side. We need to remove the three plastic wing nut style nuts that are on the backside of the taillight assembly. Go ahead and undo each of them. With those three removed, we can go ahead and pull the taillight assembly out.

To make things a little easier, we'll go ahead and disconnect the wires so we can set out taillight aside. To do that, we'll simply push in on the locking tab. Gently pull the connection apart. We'll go ahead and repeat the same process to remove the taillight over on the passenger side. We'll go ahead and pull our wiring harness down here from our passenger side taillight area. We just fed it back down and that pulled down, go ahead and take our 4-flat wiring and feed it up here over the top of the bumper as well. We've got three wires here on this plug. The green wire is the brake and turn signal and the center wire, which is brown, is the running light circuit. It will be tying in with the green and the brown wire off of this plug here. With our wires exposed, we'll go ahead and cut the green and the brown wire. Then go ahead and strip back some wire. We'll then add in a connector on each side. Next, we'll go ahead and split the end here of our 4-flat so we can peel the wires apart. Go ahead and peel the green wire out. Go ahead then and trim the excess green wire off. Strip a little bit of wire back, then go ahead and add another spade connector. Next, we're going to need to split a section of the brown wire out here so that we can connect that in as well. Now, with the brown wire split out, we'll go ahead and cut that in half here. Go ahead and strip back some wire on both sides. We'll then be connecting these two brown wires together again using the yellow or the larger spade connector. Next, we'll go ahead and take our diode and we'll need to connect the two wires that go directly to the plug to the outside of each of our diodes. We'll go ahead and begin here with the green wire. Slide the one side on, then we'll come up here, grab the other half of the factory wiring, that's the green wire. We'll put it on one of the two end probes. Put it on one of the two end spade connectors. We'll then take the green wire off of our 4-flat wiring. We'll add that to the other one. That's the end prong here. Make sure that they're pushed all the way down. We'll then go ahead and take our other diode for the brown wire. Go ahead and make sure that that goes on the out, goes directly to our plug. Then go ahead and make our other two connections. Once that's done, we'll go ahead and tape them all up and then we'll feed our plug back up behind the bumper and come out where the taillight's mounted. Now, we'll go ahead and pull our wiring harness back up from behind the bumper cover, go ahead and reconnect it to our taillight assembly. We're going to make sure that the locking tab clicks back into place with the lock. Now, we'll go ahead and put the three plastic wing nuts on the backside of the taillight assembly. Then go ahead and put the interior piece of carpeting back over it. Put those fasteners back in place as well. Next, we'll go ahead and we'll route the other three wires of our 4-flat over to the driver's side. Next, we'll go ahead and take our wires here and we'll feed them up behind the bumper cover that come out at the driver's side taillight assembly area. Next, we're going to go ahead and pull the white wire off of this bundle of three here. This is our ground wire. We'll go ahead and peel that one out. We're going to take our white wire, feed it through right here where this rubber grommet is. Feed it from the outside in. We're then going to go ahead and just take a small, little pointed screwdriver here. We're just going to put a small hole in our rubber grommet so we can pull our wire through. Now, with our wire pulled through, we can go ahead and put the grommet back in place. We'll be adding a ring terminal and tying it in with one of these two factor grounds. Go ahead and trim our wire to length and then we'll add our ring terminal in. We'll go ahead and take the top one off, you can go to either one. With our ring terminal added in, we'll go ahead and tighten the nut back down. On this side, we'll be cutting the brown wire and the yellow wire. Go ahead and give our self enough room to work. Go ahead and cut those two. We'll then need to again strip back all four. We'll add a spade connector to each. Next, we'll go ahead and trim our brown and yellow wire to length. Go ahead and split them apart. Go ahead and strip back some wires so we can add another spade terminal to each of these. We'll go ahead and take our diodes here. We want to make sure that the outside plugs in with the wires that are closest to the plug. Start with the yellow wire. Put the other two yellow wires on the inside. Once we have all three of the yellow wires on, we'll go ahead and repeat the same process for the brown wire. Now, we'll go ahead and peel the backing off the two-sided tape here. We'll stick the two diodes together. We'll take some electrical tape and wrap up all of our connections. Go ahead and plug our connection in here to the back of our taillight. Then we'll work the wires back down behind the bumper and re-install our taillight. Next, we'll go ahead and put the three plastic wing nuts back on the backside of the taillight assembly. We'll then go ahead and put the interior pieces back in. Now, we go ahead and go underneath the vehicle. We'll trim up any excess zip tie as we move along. We'll go ahead and take our jumper wire that comes with the kit, go ahead and connect it to the backside of the motor home 4-flat. Take the other end and connect it here to our vehicle. We've already gone ahead and made sure that our vehicle here is in the tow mode. Now, we'll go ahead and test out the lights using our motor home. Now, we'll go ahead and take our motor home and we'll test all our light functions. We'll begin with the running lights. Then we'll check our left blinker, now our right blinker and finally, the brake lights. You can see here all of our functions are working just fine. With that, that will conclude our installation of the Roadmaster Diode Wiring Kit, part number RM-154 on our 2012 Chevrolet Malibu. .


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