LED turn signal issues

[JimBob]

So…. I’ve been having this problem jeep came with the little 3/4 led turn signals they worked intermittently and one day finally gave up. They started just staying lit. They had resistors no idea what ohm or wattage. Went through testing a bunch of stuff everything is good. Leds must have blown from me jumping stuff and testing it bought new leds they still just stay lit. I have put in the lm470 and the ep27 to no prevail. Is this just an issue where the resistor has to be in there?
TIA!

 

[Chris]

The problem is LEDs in the fender flare side marker / turn signal. Replace those with incandescent bulbs and the rest of the LEDs will work fine.

The way the factory wiring is setup with the floating ground in those side markers causes issues with LEDs.

 

[JimBob]

The problem is LEDs in the fender flare side marker / turn signal. Replace those with incandescent bulbs and the rest of the LEDs will work fine.

The way the factory wiring is setup with the floating ground in those side markers causes issues with LEDs.

i dont have anything connected to the marker lights yet. Is that gonna cause the same issue ?

 

[Chris]

i dont have anything connected to the marker lights yet. Is that gonna cause the same issue ?

So there is no bulb in the marker lights? It should be fine with no bulbs in there.

 

[JimBob]

So there is no bulb in the marker lights? It should be fine with no bulbs in there.

No bulb nothing just bare wire. Black. Green and yellow/black. Green has nothing to it

 

[Chris]

No bulb nothing just bare wire. Black. Green and yellow/black. Green has nothing to it

Maybe post some photos, that will help.

 

[JimBob]

Maybe post some photos, that will help.

Don’t know what else to take pictures of let me know what you would like to see to help the situation

 

[S/C-HD2002]

I just went through this with my build. As Chris said, the floating ground starts getting all wonky with led lights. I didn't want a funky turn signal, corner light alternating dance, so I cut the light harness apart to isolate them from each other.

The green wire (major) is your + turn signal wire, black/yellow (minor) is + park lamps, black is ground. I cut back my harness to run the 3/4 LEDs in my Hi-Fender as a true corner clearance/park lamp and and then did JK turns/park lamps in my grille and Savvy tails.

I then cut the factory flasher relay to stop the fast flash. All seems to work well so far.

 

[S/C-HD2002]

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[S/C-HD2002]

Sorry those pictures are so huge!

I am assuming you could do the same thing with the three wire LED and cut the harness to isolate the floating ground from the park and turn wires. Once I pulled the loom off my harness I could see how they were wired together.

I back probed everything and was able to see how they functioned with park lights on, park lights off, and turns with park lights on and off.

 

[JimBob]

So they are spliced together down the line? So for the questions I’m a little illiterate when it comes to the wiring diagram. If it’s splice why would I only be getting light from the yellow/black. Also how far back do they connect?

 

[S/C-HD2002]

The factory splices were all in the signal/corner light harness.

 

[S/C-HD2002]

I studied the diagrams to no avail. It wasn't until I pulled the loom off it made more sense as to how the corner light was hooked into the turn/park lamp.

Are you only running the one LED? You are wanting it to function as both a corner lamp and your turn?

 

[JimBob]

I studied the diagrams to no avail. It wasn't until I pulled the loom off it made more sense as to how the corner light was hooked into the turn/park lamp.

Are you only running the one LED? You are wanting it to function as both a corner lamp and your turn?

I have rear LEDs as well they light up but don’t blink but they do flash with brake lights. I’ve been reading everyone had issues trying to run both corner and park lights as led so I was gonna run corner as led and either delete the parking lights or use halogen or something. When I bought this jeep it had a resistor that was wired in series not parallel but some how still worked intermittently. Is that the work of the floating ground ?

 

[S/C-HD2002]

Maybe you could isolate from the Molex connector and make a temporary harness that goes to your LED. Do a ground, park, and turn and then test function before cutting anything else apart.