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June 21st, 2008, 04:35 PM #1
Front 2-wire LED Running Light/Turn Signal Wiring
Picked up this idea from another forum. But it works very well. I just finished wiring my front turn signal LED's.
Every front LED turn signal I have found so far is a 2-wire setup (positive and ground). Yet the Wrangler's run on a 3-wire (1 running light, 1 turn signal, and 1 ground). So in order to keep the front LED as a running light and a turn signal I picked up a trailer taillight converter. I got mine from Layton Truck, it's made by Tow Ready (part #119175). I mounted mine on the passenger inner fender well. I cut off the trailer wiring harness off at the very end. I also cut off the "Tail Light" wires at the box on both sides. Next wire up the right and left turn signals (from the factory wiring harness of the vehicle) to their respective right and left turn signals on the "tow vehicle" side of the converter. Wire up the running light (from the factory wiring harness of the vehicle) to the "Stop" wire on the "tow vehicle" side of the converter. Then I moved on to the trailer side of the converter. The "right turn signal/stop" wire goes to the right LED and the "left turn signal/stop" goes to the left turn signal. Ground on both sides of the box just ground to the chassis. You also need to make sure to ground your LED's to the chassis. Remember when wiring this that on most LED's the white wire is ground and the black wire is positive.
See the picture below for a better understanding of how the wires on the converter go. Note that the cutoff wires in the picture are the ones for "tail light".
I am still working on a flasher that will work when running rear LED turn/stop lights and the front LED turn/running lights. The EP26 flasher will not blow when you turn on the hazards (which do flask at normal speed) however the turn signals still flash fast. The stock flasher flashes fast when the turn signal is on and blows when you hit the hazards (no more turn signal after that). Once I get that figured out I will post up the info on this thread.
Hope this helps out someone else. Oh yeah and in case anyone was wondering. I am running 3/4" Amber LED's in the front. Got them from GenRight and they fit into the hole that is cut in most aftermarket tube fenders.Contact me for all your firearms needs. Guns, ammo, accessories, NFA......
June 21st, 2008, 04:39 PM #2
One other note. Use the smaller of the turn signal lights on your stock harness. The big bulb is three wires and the small bulb is two wires. You only need the two wire one. I routed the bigger bulb up into the engine compartment for more under hood light when needed. Also on the running lights you only need to wire one side into the converter. Cap the other side.
June 21st, 2008, 04:57 PM #3
I guess I should go untape mine and see how I wired them. I didn't use any adapters, just wired them into the harness. They work fine for the running and turn lights.
Do you know if the flasher mod will work in your year Jp?Any fool can criticize, condemn and complain and most fools do. Benjamin Franklin
klaatu barada nikto
June 21st, 2008, 05:10 PM #4
June 21st, 2008, 09:44 PM #5
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This is good info. I have 4 of those LED penny lights up front. 2 in front and 2 on side. I get blinking and flashers on all.. No parking lights on them and when I turn my lights on I loose my side blinkers. Now I just need to unwrap it all and take a look. Someday.
June 22nd, 2008, 06:56 AM #6
June 23rd, 2008, 10:42 AM #7
June 23rd, 2008, 05:59 PM #8
I brought the side fender light harness to the grill for my front turn signal/running lights because its two-wire, then use a resistor across the regular front marker lights on the turn signal circuit. All works good, but there has to be a better way. Oh, and no 4-ways either.'04 TJ Sport, 3.5 TeraFlex, SYE, LSD, 32's
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June 23rd, 2008, 06:01 PM #9
I'm gonna try the trailer harness thing out soon, I'm curious now. The first time I messed with the front LED's was in the winter and I didn't have much patience.
June 23rd, 2008, 06:52 PM #10
June 23rd, 2008, 07:37 PM #11
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June 24th, 2008, 09:02 AM #12
June 24th, 2008, 03:55 PM #13
Tj green to light plug black.
Tj white to light plug white.
That's on a 97.
June 24th, 2008, 04:49 PM #14
He's not using the running light circuit, there's no way to do it without the trailer adapter (or some diodes). One thing to note for everyone considering this, your "running" or "parking" lights are the extra bright LED's, the same light intensity as your turn signals (because they're the same light obviously). A standard lighting setup has a much dimmer parking light and a brighter turn signal. If it were me, I'd just ditch the running lights and use turn signals only, or find a second set of less bright LED's to use as running lights.Murray's Toys: 76 FJ40, 07 KTM 450EXC, 05 Suzuki SV1000S, 12 Yeti SB66c, 06 K2 Public Enemies
I got your Jeep thing....now it burns when I pee
June 24th, 2008, 04:57 PM #15
Well thank you for your expert analysis.
My running lights work just fine and the turn signals flash.
June 24th, 2008, 05:18 PM #16
June 25th, 2008, 10:59 AM #17
With the pic shown you've only got one light function there, either turn or parking, not two like the OP asked about. So if everything "works fine" you need to give more info, otherwise all you did was replace your turn signals with with LED's, which was not what was asked.
June 25th, 2008, 05:30 PM #18
So you wanna put say a $100 on it that I'm wrong?
What more info could you want. When the running lights are on they're on. When I turn the turn signal switch on the steering column they flash.
When the running lights are on and I turn the signal switch the light flashes . Easy enough for ya?
But of course, that's not possible.
June 25th, 2008, 06:00 PM #19
Actually it works with just 2 wires. Thats how mine are, park & turn running off of the 2-wire fender flare marker light harness. Problem is, LED hasn't enuf resistance, but a big resistor on the park light circuit(on 2 of the three wires, can't remember which ones without looking) will suffice. Yet again, there has to be a better way. I'll be dissecting and experimenting on Saturday or Sunday so I'll post up with what I find.
June 25th, 2008, 07:31 PM #20
i got 100 on alThey will not make or break you.
They will make or break themselves.
June 26th, 2008, 07:25 AM #21
June 26th, 2008, 06:24 PM #22
Mike n Ike mentioned using a resistor across two of the circuit wires. Do you mean you put a resistor in series with the LED's to give them the resistance needed to operate the flasher? If so, how are the park and turn circuits combined to provide a single output to the LED?
June 26th, 2008, 09:32 PM #23
I got the flasher that says "for LED" on the top. Activating the flashers would either blow the flasher or the fuse under the hood. I didn't actually use a resistor, but it was recommended. I used another normal bulb light tucked up under the fenders(temporary fix). But the little lights on your fender flares do both park and turn functions and it is a 2 wire hookup. That is the harness I used. I will try to make a diagram and post it.
June 27th, 2008, 05:27 PM #24
Ok, now we're getting somewhere. If I understand what you're saying, the stock TJ wiring harness for the side marker lights already performs both parking light and turn signal functions using just two wires, which is common for side marker lights to work this way, especially in american cars (I didn't think TJ's did this though). Which is why you guys are getting a single light to perform both functions using only two wires, because it's factory wired to do so. Now....if this is the case, why the hell would you go to the trouble of installing the trailer adapter on the wires for the turn signal lights, instead of just using the side marker light wiring harness? It wouldn't be needed if this is the case.
June 27th, 2008, 09:32 PM #25
I guess it just takes some trial and error to figure out.......and the wires keep getting shorter, and shorter, and.............
June 28th, 2008, 08:20 AM #26
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