Blinker wiring question

[Nowik35]

So I just finished wiring up my 69 all brand new painless wire harness. Rear lights brand new housings and bulbs. Front headlights new LED with new pig tails. I don't have side markers. But here what's strange. When I turn my ignition to run. Instrument panel back lighting comes on and stays on regardless of headlights on or off. And both sides of blinker indicator lights come on solid green. But left blinker and right blinker work fine when I turn them on. So when I turn right blinker on the right indicator light blinks while the left blinker indicator stays solid. Besides that when I turn on Park lights they work fine, hazard lights work fine. Headlights work fine high and low, brake lights work fine, reverse light works fine. I don't even know where to begin to troubleshoot this thing. Oh one more weird symptom. The right blinker blinks out of sync with indicator and rear blinker, while when I turn on the left blinker. The front, rear, and indicator all blink perfectly nsync. Any ideas????

 

[Brush Hog]

If the taillights are LED you need an LED flasher. And all of those issues are probably related to a grounding issue. I had similar problems when I did my painless harness. A bad dash to body ground was my problem. LED lights can be tricky.

 

[DirtDonk]

Did you also get front turn signal housings? If so, it’s very possible that they are wired backwards.
I don’t actually think that should cause the problem, but you need to make sure that it’s not there, causing any other issues.
Make sure that when the headlights are on, the fronts are dim. And when the turn signals and flashers are on, they are bright.
Same for the rear housings too I guess. But it’s primarily the front housings that have been wired backwards for the last six or seven years or so.

 

[Nowik35]

Yup all to grounding. I ended up running individual ground wires to all the indicator light bulbs, plus grounded the instrument cluster. Also individually grounded my tail light housings to the frame. Grounded rear of frame to body. Probably an over kill but MOST problems went away. Now everything works but my flashers doesn't work anymore. Back to diagnostics tomorrow. Oh and Also the front blinkers and headlights were all wired and grounded correctly. Also every light on my bronco are traditional light bulbs except the headlights are LED and the instrument lights are little LED bulbs. Would the instrument cluster indicator lights being LED bulbs make a difference? Does the whole blinker circuit rely on convectional bulbs and their internal filimint to all work properly???
Thank you guys

 

[DirtDonk]

It can sometimes matter.
Since these bulbs are single contact and ground through the housing normally with conventional bulbs, you might try changing the ground side wire, and the power side wire, and flipping them around.
LEDs are more polarity sensitive to that kind of thing.
Of course, you would think that the manufacturer would take this into account, knowing how the bulbs are wired. But you never know.
Sounds like a big hassle to me, but that could be what’s going on.
Wait for others to chime in and see if that recommendation holds water.

 

[Nowik35]

I solved the issues. Flashers was an easy fix. I blew a fuse. So once I replaced it everything works great now. And I was able to pin point the route of my original issue. One of my rear tail housing was not grounding the brake/blinker bolt correctly. Very odd considering it's a brand new tail housing. Anyways I attached a ground wire directly to the bulb housing and all the issues went away. every light now works exactly as it should!!!

 

[DirtDonk]