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How to Remove Horns 97-05 Lexus GS300

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How to Remove Horns 97-05 Lexus GS300

Created on: 2021-01-16

In this video, learn how to replace a broken or weak horn on your 97-05 Lexus GS300. 1AAuto expert mechanics will guide you!

  1. step 1 :Removing the Bumper
    • Remove the ten 10 mm screws along the bottom front edge of the bumper
    • Pull away the splash shielding at the corner
    • Disconnect the fog light electrical connector, or remove the bulb assembly
    • Disconnect the side marker bulb electrical connector, or remove the bulb assembly
    • Repeat on the other side
    • Remove the 10 mm screw at the corner of the bumper securing it to the fender
    • Repeat on the other side
    • Remove the four 10 mm screws along the top edge of the bumper
    • Pull the bumper free
  2. step 2 :Removing the Horns
    • Remove the 12 mm bolt securing the center horn to the center radiator support frame
    • Lower the horn down to an easier to reach location
    • Disconnect the horn electrical connector
    • Remove the 12 mm bolt securing the passenger side horn to the frame under the bumper
    • Disconnect the horn electrical connector
  3. step 3 :Installing the Horns
    • Reconnect the center horn electrical connector
    • Install the center horn, making sure the wire runs behind the bumper
    • Replace the 12 mm bolt securing the center horn to the center radiator support frame
    • Reconnect the passenger side electrical connector
    • Install the horn with the alignment tab fitting into the alignment hole in the frame
    • Replace the 12 mm bolt securing the passenger side horn to the frame
  4. step 4 :Replacing the Bumper
    • Rest the bumper lightly in place
    • Replace the four 10 mm bolts along the top edge of the bumper
    • Replace the 10 mm screw at the corner of the bumper where it mounts to the fender
    • Repeat for the other side
    • Reconnect or replace the fog light and side marker light bulbs
    • Repeat for the other side
    • Seat the plastic under body shield back in place
    • Replace the ten 10 mm screws along the bottom front edge of the bumper

Tools needed for replacement

  • Ratchets & Related

    Socket Extensions

    Ratchet

  • Sockets - Metric

    12mm Socket

    10mm Socket

  • Specialty Tools

    Plastic Fastener Remover

Installation Video
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Hey everyone. It's Len from 1A Auto. I'm going to show you how to remove and replace your horn assemblies. There's two of them located on this 2001 Lexus GS 300. I'm going to show you how to do it. If you need any parts for your vehicle, you can always come down to 1AAuto.com.

We're going to start removing the 10 bolts that are under here. They're 10 millimeters, so couple of them are missing. We'll just skip onto the next, got them right here. Very simple, this is what it's going to look like. Should be 10 of them under here, just go all the way around. Here's the last one. All right, put those all safely so we won't lose anymore. Now, we can pull this down. As you can see, it comes down quite a bit which is perfect. Watch your eyes for any falling debris. I'm going to pull this down a little bit out of the way.

Behind here, you'll notice there's a fog light. That means there must be a wiring harness that leads to it. We'll take a look up in there. I don't know if you can see it with the camera, or if I can see it without the camera. If you can't get the wiring harness off, you can also just try to remove the whole bulb assembly from the unit itself. Here we go, remove that being careful not to mess up the filament or the bulb. You don't need to touch any of this glass, any type of oils or anything could become an issue. It's going to decrease the life of your bulb.

On the inside up here, we have a marker light on the side. That means that inside, there's going to be another little harness. You can either disconnect the harness or just remove the whole unit from the assembly itself. Then, we're going to go over to the other side and do the same exact thing. All right, so now that we've got those 10 out, we've got the bulbs and everything disconnected, I wanted to show you up inside here. Right there, there's another 10 millimeter head screw. We're going to use our 10 millimeter socket, put it on there. If you have an extension, that would be great. Turn it to the left, going to remove that fully. Then, we're going to work our way over to the other side and do the exact same operation.

As you can see, it's the same as the other 10 that we removed. You don't have to keep it separate. It'll match up with all the rest of them. Continuing with our 10 millimeter socket, we're going to continue to remove these four screws, one, two, three, four, starting on one side and working your way over. All right, last one. There we go.

All right, there we go. We're going to give this a yank. Being careful because it's only plastic. Let's see, I'm going to come around to the other side, see if I can break this free and maybe it'll help get that side free. Here we go, seems to be whatever is going on is going on just in this corner. I'm going to come around, there's nothing there. There we go.

Now, we're going to put this bumper assembly aside. It's just a plastic cover, we'll put it someplace so hopefully it won't get too scratched up. Starting with our 12 millimeter socket, we're going to turn it to the left. All right, it's getting loose. We're going to hold onto the horn assembly, put our ratchet down, remove that. I'm just going to come down here. All right, you'll notice behind the horn, there's a two wire system. All we're going to do is we're going to squeeze this little tab right here, nice and squishy, grip and pull.

Now, we're going to look inside the wiring harness, make sure that there's no corrosion or rust. Looks great to me. We'll be clear to replace this horn assembly. Coming over to the second horn assembly that I'm going to work on. Once again, turning to the left with our 12 millimeter socket. It's getting very loose. I'm going to make sure that I'm holding the horn assembly, so it doesn't fall. Grab my bolt. We're going to notice the same system, except this is a one wire system. Either way, we're still going to grip the little tab, squeeze it and pull. Once again, looking inside the wiring harness, make sure there's no green, brown, blue, any color that shouldn't be a silver. That looks good to go. Now, we can go ahead and replace our horn assemblies.

All right. What we're going to do is we're going to start with the upper horn assembly right here. I put my bolt in so I remember where I put it, just give it a couple of screws out. Hold onto it in your hand. We're going to take your wiring assembly, and we're going to click it into the backside of the horn. You can tell which way it goes, because there's a little nub there. That's the lock, there's a hole, and there's your click.

Next, we're going to run it back up along the backside of this bumper assembly. That's the way it came out, that's the way it's going in. Put the horn facing down, it can't really go any other way. It's easy for anybody. We're just going to get this started in. Where these two horns are two separate assemblies, we can go ahead and tighten this one right down taking our 12 millimeter socket, turning to the right to tighten it. These are very small bolts, so you don't need to use a long handle ratchet. Give it a nice tweak, that's nice and firmly mounted.

Next, we're going to move onto our lower horn. I did the same thing down here. Remove the bolt, grab our horn assembly, taking a peek. We got our hole, we got our lock and clip. We're going to connect those two in together, click, love that sound. Next, you'll notice there's a little tab right here. It tells you which way it goes. Don't want to go this way, don't want to go this way, you don't want to try to mount it on here. Just put it back where you got it from, that's the way it's meant to be. Start that puppy in, that feels pretty good. Going to grab my ratchet assembly and my extension. Going to go ahead and tighten that right up.

One thing that I'd like to mention is while you're tightening, things are moving around. If this came out, it might not be in the hole anymore. Just take a peek, looks good to me. We'll continue tightening to the right. That's nice and tight. Now, we've installed both of our horn assemblies. This vehicle's going to be good to go down the road once we get everything covered back up.

All right, so now we're going to go ahead and start putting this bumper cover back on, being very careful not to scratch our lenses with any plastic. Just try to come up and over, we're going to just set it on there just like that. Hold it with your leg if you can. Just try to get everything set up so it's pretty close. Then, we're going to go ahead and grab our bolts that looks good. I'm going to grab my bolts, and we'll move onto the next step.

All right. Taking some of our fine pitch bolts right here with a 10 millimeter head, we're going to go ahead and line up our holes. As you can see, it lines up pretty well. Put it in there, try to get it a little bit started. Let's see, I need to give it a little push just to give it a little coercion, should start screwing right in. That feels good. Just get it started, so we're going to want to line up the rest of the holes, off of there. Move onto our next hole. Once again, lining up the hole, start it in. All right, those are coming along good.

Now, we're just going to move along to the other side doing the same exact thing. Now that I've tightened up the other two, I'm going to go ahead and start tightening all of them down. That feels good. We're just screwing into plastic here, so you don't have to tighten it down too much. Feels good. We're going to move along to the other side and do the exact same thing. All right, so now we're going to start the hidden bumper bolt in. See if I can get it lined up with the hole and turn to the right, should screw right in. All right, leaving it fairly loose in case we have to maneuver the bumper at all. We'll just have to remember that we need to go back in and tighten that puppy up.

Next, I'm going to go over the other side, do the exact same thing. All right, now that we have the upper part of the plastic bumper mounted in, we're going to go ahead and reinstall the bulbs that we had removed, one for the fog light and one for the marker light on the side of the bumper there. We're going to take it and come from behind, always with safety glasses so nothing falls in your eyes. I should bring it back down. I'm going to show you, there's three prongs. There's going to be three holes inside the fog light assembly. We're going to try to line those up. If you can't get it right off the bat, that's fine, just keep spinning it. At some point, it will line up. Let's see, there we go. There's one.

Next, we're going to grab the marker light assembly. We're going to stick it up in there and do the same exact thing, going to try to line up those holes, latches right in. Now we've got that done, we're going to move on over to the other side of the vehicle and finish up those bulbs. We'll make sure they work. Then, we'll go ahead and mount up this undercarriage shield.

All right, so now it's time to start installing the bolts that we have for the bottom side of this shielding system. What you're going to notice is that it has a little clip on this one and should have one here. Doesn't, but we'll just go with what we've got. We're going to slide this piece into that clip right there. If there was one here, we would put it there. Since it doesn't have it, we'll just put it above the plastic part of the fender, of the bumper cover. We're going to slide it in, clips in. Then, we're going to take our 10 millimeter head bolt. We're just going to start it in there. We're going to go all the way along the whole lower area of this, and we're going to put in bolts everywhere that we took one out. Get that started. All right, good to go.

Thanks for watching. Visit 1AAuto.com, your place for DIY auto repairs, for great parts, great service and more content.

Tools needed for replacement:

    Ratchets & Related

  • Socket Extensions
  • Ratchet

  • Sockets - Metric

  • 12mm Socket
  • 10mm Socket

  • Specialty Tools

  • Plastic Fastener Remover


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