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View Full Version : [How-to] LED Tail install


bobbo27
03-21-2005, 05:54 PM
I know there are some on here for CJs, but I couldn't find one for a YJ. And I just did it, made some mistakes, so you can learn from me.

First off, everything you need:
Lights - I used 4" round brake/turn lights. $25 x 2 = $50 (make sure you get combo lights, they should have 3 wires)
Trim rings, or rubber gaskets: I got stainless trim rings: $5 x 2 = $10
Wire harnesses: $5 x 2 = $10
Total for tails = $70 Reverse light: $15
Wire harness: $2
Gasket: $2
Total for Reverse light = $19 Misc: LEDs don't draw enough current, so the signals won't work unless you get a new electrostatic flasher. ~$10

So the total for everything is ~$100. I got everything I needed at the local Napa.


Tools Holesaw works great, just depends on the size of your lights
Tin snips: needed for small trimming, or if you don't have a big enough holesaw
You could also use a jigsaw, plasma cutter, whatever you like to cut metal with.
Electrical multi tool
Wire crimps/splices or nuts
Misc screws for attaching lights, grounding, etc
Possibly extra wire for grounding
Drill for holesaw, or just for pilot holes
Screwdrivers, ratchet set for removal of stock lights


This can take a few hours, or a few days, if you don't know what you're getting into.

Once you have everything ready, you'll need to remove the stock lights. The lens has 4 screws, and the housing is held by 3 bolts. I'm hoping you can handle that part without too much help.

Once you get the stock lights off, you have to cut the wires. Cut as close as you can to the housing, unless you plan on selling them. Small scissors work well to get the outer cover off, if you can't just pull it.

Marking the holes is very important.

Knowing where your holes are going is very important.

The inside of the tub goes down 4 1/4" from the bottom of the hardtop, or 14 1/2" from the bottom of the tub. You don't want to hit the inside of the tub - It's another layer to cut, and it starts your carpet on fire. Yes, that's the voice of experiance.

If you use a holesaw, the center should be 12 1/2" or less from the bottom.

Check the size of your bezels or grommets. Mine were a little over 4", but if you get rubber grommets they will be bigger.

Measure twice, then measure again and mark it. Then measure one more time to make sure. Be sure wires are out of the way. Then cut.

Depending on your method of destruction, you may need to trim to fit.

Now you get to hook up electrical.
You should be able to unhook the harness, and have easy access to the wiring. It's pretty simple, your lights should have 3 wires. If they don't, you got the wrong ones. It says right on the light what each wire is for.

According to Chilton, my 1994 YJ 4.0 has a white brake wire and a light green/black wire for turn/hazard and the reverse light is white/black. I can look yours up if you need it.

Slip some heat shrink over before you crimp the wires together, hook up the harness, run ground wires to chassis, change the flasher (which is with the fuse panel, drivers kick) and test. Try L/R turn signals, hazards, and brakes, with lights on and off. All should work as normal, and if it doesn't, check connections and grounds.

When everything works, final install it. Depends what you got for this, but I just drilled some pilot holes and put sheetmetal screws in.

Finished:
http://memimage.cardomain.net/member_images/2/web/194000-194999/194407_63_full.jpg

Reverse light(s)
I only got one reverse light for now. I have nowhere to put the other one, until I get a tire carrier. Then I'll have 2 floods on a switch.

For now I have this:
http://memimage.cardomain.net/member_images/2/web/194000-194999/194407_64_full.jpg

Notice the bit of silver there on the bottom lefts? That's a body mount. Sucks to hit with a holesaw. Sucks a lot. Jarred me pretty good, messed up some of my paint, but the rubber covered it. Fixed with silicone now, but pissed me off at the time.

If I could un-destroy my body, I would just use a surface mount. I'll leave that up to you.

Anyway, it was easier to hook up. Its a simple light, 2 wires. One (white/black) comes from the wire harness, the other goes to ground. I used the same place as the tail on that side - just a hole drilled in the body behind that mud guard, with a screw though the ground connectors.

That pretty much covers it. I'll be glad to help with any other questions. You can email me at robby_777@hotmail.com, or get me on MSN with that addy. :rockz:

bobbo27
03-23-2005, 01:52 AM
100 people have looked at this and not a word from any of them?

Jays89YJ
03-23-2005, 02:08 AM
Awesome Write-Up! :rockz:

Now I want LED tail lights. :agree:

Janster
03-23-2005, 06:35 AM
Great write-up.....
There's been a lot of folks who have done this - and everytime I see one, I get new ideas for my own rig.

My husband and I have been wanting to do this for a long time.

However - we're undecided what to do with reverse lights and license plate. We have a rear bumper with a tire carrier which inhibits a lot of places to put things.

Do you offroad much???

That license plate is gonna get whacked off.

I've been wanting to put the gas filler on the side like the TJ's......
Thinking about putting reverse lights in the 1" gap from our body lift.

I just now thought of possibly putting a TJ license plate holder on - but wondering if I could *disconnect* it for offroading. Hmmmmm......

1 ton yj
03-23-2005, 08:07 AM
Use a small white LED Radio Shack for the reverse light. They are about $5 each and bright enough. You can get plate frames with lights in them. I got mine at the swap meet years ago for $7

bobbo27
03-23-2005, 10:25 AM
I considered a few things for the reverse light, like putting something in the body lift gap. But I'm chunking that pretty soon, so this will work and be legal until i mount some floods on a tire carrier. Like this:
http://memimage.cardomain.net/member_images/7/web/475000-475999/475506_27_full.jpg

The license plate won't come off - I made a receiver mount for it, and it's only connected at the top. It's just some square tube with a hole in it, welded to a scrap to bolt the plate to.

So even if I forget to take it out (which I have) it just bends backwards and I don't have any less clearance than if I took it out.

smellsfishy0
03-23-2005, 05:27 PM
bobbo27 i like the round tails but those oval reverse lights look odd.....specialy mounted w/round tails. but hey its your jeep:yup: , another thing, is it me or is the right brake light lower than the left?

currupt4130
03-23-2005, 06:46 PM
semi related here... ive done this and now my left blinker doesnt work when my running or headlights are on. when i turn on the left blinker with the headlights or running lights on it cuts off the rear lights entirely. the right one works. im not an electrical whiz so im gonna ask the obvious. does anyone know what might be wrong?

bobbo27
03-23-2005, 07:06 PM
Well I only have the one revers light, and it doesnt look that bad if you can see the whole thing. It's not exactly what I wanted, but like I said people can learn from my mistakes. I don't know if I'll try to fix it later.

The lights should be level....I did measure them after all.

bobbo27
03-23-2005, 07:08 PM
-=- originally posted by currupt4130 -=-
semi related here... ive done this and now my left blinker doesnt work when my running or headlights are on. when i turn on the left blinker with the headlights or running lights on it cuts off the rear lights entirely. the right one works. im not an electrical whiz so im gonna ask the obvious. does anyone know what might be wrong?
Try switching the wires - one is the normal light, and the other is the flasher. I had the same problem, with results something like yours.

kaffeene
03-23-2005, 07:26 PM
Yah I read this about a minute after you posted it, like you said you were gonna do. I was gonna post something earlier but PMed ya instead.

I like these lights but not sure what to do about reverse lights.
I have a pare of 55w 3"x 6" lights that I'm not using but don't feel like running more wires to the back. I just got done running wires for my stereo, lightbar, fog lights, underdash l.e.d.'s and I made a custom switch plate out of ABS plastic and don't feel like messin with it more.

bobbo27
03-23-2005, 10:05 PM
You don't have to run wires you know, you can just tie them into the existing reverse lights.

kaffeene
03-23-2005, 10:22 PM
well.. 55W reverse lights.. Isn't the wire feeding stock like 18awg?

bobbo27
03-23-2005, 10:26 PM
I don't know really. What's the wire on the lights?

And you could just run through the frame too, and only go into the body for a switch through a drain hole.

kar298
03-24-2005, 01:48 PM
where did you get those reverse lights at??

bobbo27
03-24-2005, 03:18 PM
I got everything at the local NAPA.

I would assume any auto parts store would have everything you need, but I'm not sure.

currupt4130
03-24-2005, 03:50 PM
got my flush mount regular lights for 8 bucks a piece at walmart

bobbo27
03-24-2005, 04:11 PM
-=- originally posted by currupt4130 -=-
got my flush mount regular lights for 8 bucks a piece at walmart
LEDs are cooler :avid:
I think they regular lights were about that much at napa too.