Here's my issue:

A few days ago when I was driving my '94 Ranger 4x4, the turn signals stopped working. I checked them out when I returned home and here is what's going on:

When headlights are off:

-Turning on left turn signal, All signals flash, including license plate lamps and dash lights. Left signal indicator on dash works as if they're on correctly
-Turning on right turn signal, functions just fine.
-Turning on Hazards, all four flash, including dash and license plate lamps.


When headlights are on:

-Turning on left turn signal, No flash from any of them, drivers front gets a little brighter, as well. Left indicator on dash stay solid.
-Turning on right turn signal, works correctly.
-Turning on Hazards, no flash from any of them, but fronts gets brighter. Indicators bulbs on the dash stay solid.

There were aftermarket LED taillights installed when I purchased it, and Halo Projector Headlights. I removed LED tails and used a normal bulb, and no changes in the above. I switched bulbs out of all four turn signals and nothing changed, as well. The projectors are not hooked in, nor are any other accessories.
It does have a towing package, and all wires there are properly connected. I also checked all fuses and none are blown. When I replaced a signal fuse with a higher amperage one, they functioned fine for a little bit, but now they are back to the above.
I also replaced flashers, those didn't fix it either.

I know the next logical thing to do would be trace the grounds and see if any are shorted out, but I'm not very electrically inclined nor do I have a Voltmeter, so I am looking for another possible option

Also tried a new Multifunction Switch and Headlight Switch, neither of those resolved the issue.
However, if I remove the green/orange wire leading to the left rear signal, it appears as if everything is functioning correctly.

I am truly baffled as to what the issue may be. Any help would be greatly appreciated.

Thanks in advance,

Zack

 

Solved the issue, the harness for the trailer wiring was bad. Pulled it off and all is good again.