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Roadmaster FuseMaster Fuse Bypass Switch Installation - 2018 Chevrolet Sonic

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How to Install the Roadmaster FuseMaster Fuse Bypass Switch on a 2018 Chevrolet Sonic


Speaker 1: Today on our 2018 Chevrolet Sonic we're going to be taking a look at, and showing you how to install the Roadmaster FuseMaster fuse bypass switch for towed vehicles with two 20 amp mini fuses, and that's going to be part number RM76512. Now we're also going to be installing the Roadmaster FuseMaster fuse bypass with the single 20 amp mini fuse, part number RM76511, because of our specific configuration. You should always double check your owner's manual and see which fuses need to be pulled in your Sonic.So here's what our fuse bypass switches look like once we have them installed. The owner's manual in our Sonic does recommend that we pull a fuse out before we tow, and these switches are going to prevent us from having to reach underneath the dash, or going underneath the hood every time that we tow it. A simple flip of the switch and we're going to cut the power going to those fuses, but at the same time flip them back and our car will drive like normal.Now an easy way to show you that our switches are working is right now they're both in the drive position. So if I turn my ignition on, we can see that everything's working normally.

And if I press it on the clutch the car is going to start. Now if I turn them both in the tow position. For one we can see that our dome light goes out, but also when I turn the ignition on nothing's happening because it's cutting power to that ignition source so it doesn't drain the battery while we're towing it. But then if I turn it back into drive, give it a few seconds for those fuses to get energized, we can see everything's coming back on like normal and the car will start.Now we mounted our switches right by the fuse box which is going to be just to the left hand side of the steering wheel. Now if you look at the back of the switches we have one that has four wires, and one that has two wires.

And that's because our Sonic particularly needs several fuses to be pulled. So we have one that's actually routed to the outside underneath the hood for the single, and then we have two fuses in this panel that we needed to bypass so we used a double bypass. That way it prevents us from having a whole bunch of switches, and it keeps everything nice and neat and easily available. Your Sonic may be a little bit different than ours, so you want to double check your vehicle's owner manual, and the fuses that are in the fuse box to determine which ones need to be pulled.Now that we've seen what our switches look like installed, and talked about the convenience of them, let's show you how to get them installed. So here's what our fuse bypass is going to look like before we have it installed.

We're going to end up having a total of two switches mounted here in the dash. So we can start by coming to the driver's side, right on the left hand outer portion of the dash here. This is where our fuse panel is going to be on the inside. So if we just reach into that hole, we can pop the cover off. Now on the back it is going to have a legend of all the fuses and relays that are inside, and to start out we're going to want to find BCM1 and BCM2.

Those are going to be the two 20 amp fuses all the way towards the outside.So we're going to want to pull both those 20 amp fuses out. Just grab a pair of needle nose pliers, pull those out, and make sure you pay attention to the location of each fuse because we're going to be putting our fuse bypass into those places. And if you look, you want to double check to make sure that the fuse bypass prongs are the same size as the fuse itself. This is designed to accept ATM mini fuses, so if you have different fuses inside, a different size, you're going to need to pick up the same amperage fuse that will into our fuse bypass.So you'll notice that we have two red wires and two black wires. Each one is a pair so we're just going to take one set and we're going to plug it in just a fuse, plugging the prongs into each one of those sections where the fuses normally go. And since it's the same size fuse, it doesn't matter which one we put it into, but you just want to keep track and make sure that the two black wires are together, and the two red wires are together. So now that we have all four of the prongs plugged in, we're going to make sure that they're fully in there, and if we come back to the switch, there's going to be a plastic divider, and that's going to be separating our red and black wires.So we're going to want to pull the red and black wires off the terminals. Kind of wiggle it back and forth, and we can pull that spade terminal off. It is a little bit of a tight fit, so you just want to be careful not to break the terminal or break the switch when you're taking them off. You'll notice that there's going to be node on the back of the switch itself. We want to go ahead and remove that as well. And this way we can mount our switch in a convenient location. Now what would make the most sense for us is to mount our switch on the panel that's going to cover up the fuse box. So since we're doing two, I'm going to offset it a little bit from the center so I can put my other one in place next to it. Now if we flip it over, we are going to have that legend.Now I suggest that you remove this sticker, maybe put it in your owner's manual or somewhere safe inside your car, that way we don't damage it because we are going to have drill a hole to mount the switch. So we just peel the corner back, and carefully just start removing the sticker. We won't have to worry about tearing it up. I'm going to be using a step drill bit to drill into the plastic here, and you're going to want to make a three quarter inch hole for each switch that you're mounting. Now it's not a bad idea to drill a little bit, test fit the switch, and if you need to come back and drill it just slightly bigger. You don't want to make the hole too big to where the switch is going to be loose.Another tip is if you're using a step bit, as you can see it kind of tapers out because of the shape of the bit. So if you flip your panel over and drill from the backside, so you have a nice even hole. Once we have our hole drilled out and our switch fits inside, we can flip it back over, and grab the retaining nut, and we're just going to thread it back on there, and that's what's going to keep that pressure onto our switch. Now if you look there's going to be some teeth on there. You want to make sure that those teeth are facing the back of the panel so it can grab on to it. So now that we have this switch mounted, we're going to go ahead and drill another hole and mount our other switch.For our second fuse bypass switch, we are using a single fuse bypass because there's going to be one more fuse that we're going to have to pull, however this one's going to be underneath the hood. So rather than having to open the hood every time and flip the switch under there, we just decided to mount both of our switches in a convenient location inside the car. Now obviously our fuse bypass isn't going to reach outside with the length of wire that is provided. So what we're going to do is we're going to pull back this loom a little bit, and we're going to cut our wires and we're going to splice on a length of wire so it can reach. You just want to make sure that you hold on to the ends so that we can put them back in place once we get it out underneath the hood.So you just want to cut your wires, and you want to stay away from the connection point that's right here because that's another connection point that the manufacturer has made. So we'll just move down a little bit, cut the ends off, and we'll strip back both ends of our wire. Then we're going to take a blue heat shrink butt connector, put it on at the end of each one of our wires, and crimp it in place. Now if you have extra wire, you're going to want to use close to the same gauge, you don't want to go too small, you don't want to go too big. So 16 gauge wire would be a good size. So I have some extra 16 gauge wire I had laying around, and this just happens to be black so I'm going to go ahead and use that.Now if you do need some wire, you can pick some wire up by the foot here at eTrailer.com. Let me just take our extension and crimp it onto our butt connector. Now with both our wires extended, we're going to send this out through the firewall. Now the easiest way to get through the fire wall into the engine compartment is if we follow the floorboard up, there is going to be a rubber grommet that's going to be in the firewall. We already had to send some things through, so we're just going to take something to push that wire through.Now I used an airline tube that I had laying around. You can use a coat hanger, or whatever you have available. But there's going to be a grommet that's up high on the dash. It's actually easier to get from the engine side. This is right by the brake booster, and it came out right by where my fuse box is. So now I'm just going to take my two wires, and I'm going to secure it to my airline tube, that way I can start pulling through and not have to worry about dropping it. So once we have our wires coming through, we'll pull the excess out. Just want to make sure you leave enough room so that actual fuse bypass is still in that compartment and we don't pull it too far back.With our wires through the firewall, and we know we have enough room to reach, I'm going to go ahead and shrink down the butt connectors. Now I'm going to be using a heat gun. If you're using an open flame like a lighter or a torch, just be careful not to char or burn the wires or the connectors themselves. So our wires come out right by our fuse panel here. And if we come to this back corner, we can lift up and squeeze those two tabs, and then remove the cover and set it aside. Now underneath here we're going to be looking for the number seven fuse. So you're going to want to use the legend, figure out where the number seven fuse is, and it's location. So if we look on the legend it should be in the center right here. It's going to be that seven and a half amp fuse in between those two five amp fuses. So we can go ahead and pull that out, and again this is a different style fuse than what our fuse holders are going to accept.So we're going to have to get a seven and a half amp ATM mini fuse in order to put into our fuse bypass. But if we look, the ends on our fuse bypass are going to fit, and just to make sure we can always test fit it just to make sure they go into the spot. So they do fit into the terminals, we're just going to have to find the correct fuse to put in the actual fuse holder itself. So we can take our wire, and we're just going to estimate about how much wire we need. It's not a bad idea to give yourself a little bit of an excess slack. And once we have those trimmed, we can strip back the end of each wire. Then we'll take another heat shrink butt connector, put it on the end of each one of those. Then we can take our terminal ends, strip back the end of the wire, and we'll crimp them into each one of our butt connectors.So now we're going to take our terminals, and we're going to put them into the fuse spot, making sure that they go in there fully and they seat all the way. And we can route our wire so that it won't be interfering, however we are going to have to cut a small notch so that the wire can fit down so our covering can go back in place. So I'm just going to take a pair of side cutters, and I'm just going to cut a small notch out of the side of the plastic here. Doesn't need to be very large but just big enough so that my wires can pass through. And then we can test fit the cover to make sure that it'll go back into place without any issue.inaudible 00:12:41 Clean up some of my wires back here. Put that loom back. And then for our single fuse bypass, inaudible 00:12:48 remove that seven and a half amp fuse. So again you're going to want to find one that fits in to the mini fuse holder. So we're going to take that fuse, put it into our fuse holder and close the cover. Now for our double fuse bypass, we're going to take the factory fuses and we're going to put them into the terminals. Now since these are both the same size, it doesn't matter which one they go into. But you want to pay attention if they we're different to make sure that the black wires that go to your terminal are going to match up with the fuse you put in and so on for the red one as well.The easiest way to tell that is just remove the loom here, kind of split it back and look for which color wire is going to each one of those fuse holders. So now with the switches and our fuses in place, we can go ahead and start hooking everything up. So again this single one, just going to take the terminals, plug them back into the switch, and we'll do the same thing for the double. On the double one again, you want to make sure you pay attention to that plastic divider because that's going to divide the two different colored wires. So just make sure you have both reds on one side, and both black ones on one side. Just want to double check to make sure those fuse spades are in place. I'm going to tuck our wires back in, and put the cover back in place.Now you want to pay attention to the orientation of the switches. You want that dot to be in the up position, and then each one of our kits is going to come with a few stickers so that anybody driving your car is going to know what's going on. And the drive sticker is going to go on top where the dot is. And then also in our kit it's going to have a tow sticker which is going to be put on the bottom. So we'll put the stickers on for each switch that we know what position it's in.So now that the switches are installed, it's always a good idea to cycle through everything. So go ahead and flip them to tow mode, and make sure the power is cutting off what it needs to, and then also switch it back to drive mode. It's a good idea to give it a few seconds so the fuses can get energy again, and then make sure that the car starts and everything functions like it should. And that'll finish up your look at the Roadmaster FuseMaster fuse bypass switch for towed vehicles on our 2018 Chevrolet Sonic.


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