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Roadmaster Diode 7 to 6 Wire Coil Kit Installation - 2012 Cadillac SRX

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How to Install the Roadmaster Diode 7 to 6 Wire Coil Kit on a 2012 Cadillac SRX


Speaker 1: Today on this 2012 Cadillac SRX, we'll be having a look at and showing you how to install the Roadmaster Diode Kit for Towed Vehicles, part number RM-15267. This diode kit will allow you to have all the necessary and required by law lighting functions that you need when you're flat towing your vehicle behind your motor home. These diodes will also help protect your vehicle's expensive electrical components from any electrical feedback that may occur between your motor home. Now that we've gone over some features, we'll show you how to get them installed.A good time to run your wiring behind your front fascia is when you're installing your baseplate. We already did that, so we can begin hooking up our front connections. Slide the wires through it.

Black dust cover for our connector. And you can see these little Phillip's set screw right here. Let's back those out for the ones that we'll be working on.We'll start with the ground wire, which is this terminal right here. Feed the white wire. Undo this set screw.

Insert the wire, and tighten the set screw on down. Now we'll do the left turn signal, which will be the yellow wire. Now we'll do the right turn signal. Now we'll do the tail lights, which is the top one. It's the last wire you have left; it's the brown wire.With all of our wires nice and secure, we'll push the dust cover back on, and we will wrap some electrical tape around it just to ensure that we have a nice waterproof connection.

Take our connector, and we'll secure it to the mounting point on our faceplate using some self-tapping screws. Now we have a good solid place to put our wiring harness that will go to our RV.All right. Now to figure out where we're gonna route our wiring from the front of the vehicle, let's start with removing our tail lights. Open up the rear hatch first. Now, we'll need to remove this black plastic piece here, which covers up our tail lights.

There is a trim panel fastener right here, we'll just pop out the center of it and remove the back of it. There's a little slot you can start working it in, and slide the tool in. Pull out the center. Pry the back off. And this panel should pull forward, like so.Then we have two Phillip's screw to remove in order to get the tail light assembly out. The screw's out. Let's grab the tail light assembly and pull it towards us.Now, with our light assembly out, let's start with disconnecting the bulbs and the plug in for the LEDs. Now, we'll be pulling the wire up from the driver's side. I went and grabbed a red air line here, which we'll use as a pull wire. We'll just fish it down through the bumper until it comes out the bottom.Now that we have our pull wire down, we'll start routing our wire. With the wire on the inside edge of our subframe, we'll go over the back of the subframe and under the rack and pinion. We'll take some long zip-ties, and we'll secure it to the inside edge of the subframe here, and this will keep it away from any moving parts.Now at the back of the vehicle and front of the rear suspension, we're gonna slide it up and over the rear subframe. This wire loom here, this'll keep it in position, and it won't make it slide down further up, causing it to drag on the ground. Continue going over the subframe, and we go over the rear sway bar, and around this exiting wire loom. We'll route it up and over this exhaust hanger. We'll secure it again with a wire loom on this side. Now I'll tape the end of our wiring harness to this pull wire that we dropped down.All right. Now that we've got our pull wire out, just go ahead and pull up all the excess wire. Now let's take a pair of side cutters, and start separating the individual wires on our harness and pulling them back.With our wires all separated down here to the base, we can take our white wire, which is our ground wire, and cut it about here. There's an existing ground right here for a trailer tow wire harness. We're going to remove that screw and ground to the same point with a ring terminal. Strip our wire back about 1/4 of an inch like so. Twist it. Put our ring terminal on the white wire. Crimp it down. Remove the screw that holds the existing ground in. Put the white wire on. Reinstall the screw. Got a nice solid ground there.This yellow wire here is the brake light signal wire. Want to cut that, and we'll use that for our turn signal and brake light combination. Take our blue spade connectors . With the yellow wire from our tow harness already connected to the input side on the diode, connect the yellow wire that goes to the brake light on the output side, and we'll connect the vehicle side the other other input.Now this purple wire is the wire for our tail light. Pull back on this loom here a little bit, and we'll cut the wire right here in the middle. Strip our wire again. Take one of our blue crimp spade connectors, and put it on the wire going to the tail light. Crimp it. Take another one of our blue spade terminals; crimp it onto the other end of the wire. Take our diode pack out, going towards the tail light again, and then one of the ends on the vehicle wiring harness.Now let's take our brown wire from the tow harness, cut off just enough so we have something to work with, and strip back about 1/4". Now using some of their excess brown wire that we have, we'll strip back one end of it, and we will combine both brown wires, and use the yellow spade connector and we'll crimp it down. Then we'll connect that to the end on our diode pack. The other end of the brown wire that we have will run across the other side of the vehicle.With all of our connections made on the driver's side, we'll take the brown wire that we're routing over to the passenger side for the tail light, and the green wire, which will be our right turn signal and our right brake light. So we'll just use a plastic panel tool so we don't scratch anything. Then once we get to the passenger side, try to work it behind the bumper cover a little bit, just so it'll clear the tail light panel.Now we'll take our green wire, that'll be our right side turn signal and brake wire. Cut there. Strip it on both ends. Put our spade terminal on. Both of the wires that we cut will get a blue spade terminal. Take one of our diode packs; connect it to the inside, and the out go towards the bulb. We'll take our green wire that we ran over from the passenger side to the tail harness, cut off a little bit of it, just so we have enough to work with. Install the other spade terminal, and we'll connect it to the other input on the diode pack.Now, on the tail light connection that we're gonna use, we need to find out which one of the three wires provides the hot signal to the tail light. Now, as you may have noticed, we didn't test the wires on the driver's side, but that was because the vehicle already had an aftermarket tow package on it with a wiring harness, so we we're able to easily identify what wires we're what on that side. This side, however, is a different story. So you always want to make sure, if you don't where your wires are, you test before you make any connections.With our tail lights on, the hot wire here is the one in the middle. It's this brown wire with the white stripe. We'll cut it right here, about in the middle. Strip the wire back on both ends. Attach our blue spade terminals to both ends on it. Take our diode pack, the out going towards the tail light assembly, the in going to the vehicle wiring harness. Take our brown wire, cut off any excess we may have. Strip some back. Crimp on the last spade connector, and we'll plug it in to the last input on our tail light diode pack.Then if you put a little bead of silicon between the two tabs on the input side, it'll help prevent a short if any electrical corrosion should build up from electrolysis, from salt water spray, or . So just put it between the tabs, and you want to make sure that you do that between all the tabs on the input side on all the diodes.With our connections made and the silicon applied between the tabs, it's a good idea to wrap everything up in electrical tape, just to provide some added security from moisture, dirt, and debris. With everything taped up, we'll put our bulbs back on, remake our electrical connections.With our tail light assembly back into place, we can go ahead and reinstall our screws. Let's put this black trim panel piece back on. Reinsert it, and we'll do the same on the other side.Okay, now we'll test our functions. We'll do the combination left brake light, we'll do the combination right brake light, and we'll do our tail lights.And that completes our look at and installation of the Roadmaster Diode Kit for Towed Vehicles, part number RM-15267, on this 2012 Cadillac SRX.


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