Electrical Gurus...

[jimbo92]

This damn thing is driving me crazy. Ive got some poison spyder 3 wire LED lights for the front fenders on this 99 tj im screwing with. Ive already done the led flasher and the flasher and signals work as intended. However with the signal wires hooked up the running light feature of the bulb does not function. If unplug the signal wire the running light will come on. Nothing more frustrating than a 3 wire light causing trouble at the end of a build...

Anyone run into this?

 

[rattle_snake]

Sounds like a GND issue. hook the gnd wire to bat to test.

 

[Bebop]

Check if you don't have residual voltage coming out of the signal wire (use a volt meter).

 

[jimbo92]

Sounds like a GND issue. hook the gnd wire to bat to test.

No luck here

 

[posford]

You gotta have something hooked up backwards?

 

[AgitatedPancake]

Do you happen to have the wiring diagram you could post for the lights, and even for the jeep if we're lucky? I know on WJ's they have some sort of odd sequential grounding thing for the turn signals that can create strange scenarios

 

[jimbo92]

It shouldnt be rocket appliances but its got me all fuckin twisted up. White wire to the black/yellow wire on both sides and the red wire to the grey wire on left fender and tan wire on right. Black to black. As soon as you hook up the turn signal wire it kills the running light. Apparently its the flaoting ground that kills it. Apparently there is some trickery with resistors and diodes you need to do. Stereo guy at work is bringing some in tomorrow to try. However the 3 wire poison spyder light is supposed to negate this. Unfortunately they tanked so theres no support.

 

[AKnate]

I must need a nap, I about blew snot bubbles laughing at rocket appliances.

 

[rattle_snake]

I'm no rocket appliance, but a LED light is a diode.

Is the turn signal and/or running light circuit a 'switched GND' instead of 'switched +12V' If so the LEDs are backwards inside the light (it is meant only for a switch positive system). Can fix with inverting relays.

But, first measure the voltage (from bat) on all three wires under these conditions;
-everything off
-running light only
-turn only
-run + turn

Is one always powered?

Then you will know, and how to fix.

 

[jimbo92]

Drove it last night for the first time. Definitely have a ground issue. When you turn the headlights on the headunit goes black and says "no camera found" Im guessing the stereo guy zigged when he should have zagged.

 

[jimbo92]

Well, isolated the camera issue to a bad ground at the tail lights. Jeep had been painted so had some paint in the bolt threads were the housing grounds.

Marker lights ended up requiring a one way diode on the blinker wire to keep the floating ground from jumping around. Good to go.

 

[SLOWPOKE693]

This thread makes me glad I never installed the PSC LED's I bought for my wifes JKUR 5yrs ago when I swapped the fenders over to GenRights.