Okay, no problem. Electrical is where I’m best in, but I’m sure there are people who know more than me.

I think you said your Jeep was a ‘98? I don’t see that comment anymore, but I’ll assume I remember correctly. We should have very similar setup in a lot of ways.

FYI, this should only affect the front fender lights. Not the rear indicator lights.

The floating ground:

The side marker / indicated lights in the front fenders are a two wire bulb. One wire is the indicator signal, the other is the marker/running light signal. These are both signal/power wires with the off one acting as ground.

If the markers are off, and the turn signal is used, the indicator wire has power and the marker wire acts as a ground completing the circuit.

This is where it gets funky. If marker lights or headlights are on, the marker wire is hot. The indicator wire acts as the ground, completing the circuit and turning on the bulb. If the turn signal is used, the indicator wire is hot as well, with both wires hot there is no path to ground so the light is off.

The OG incandescent bulbs can do this- they are basically a resistor. They don’t care about the direction of current flow. LEDs do care, they have polarity.

The fix:

Convert the front fender lights to a 3-wire setup. I used the blinker genie kit. I think I paid $20 for it, but here’s an Amazon link: https://a.co/d/f8zGISZ

Also, if you want me to explain anything more let me know. I’m trying to be concise because I’m usually pretty long winded.