Turn signal switch woes

[65ChevyC20]

I'm having an issue with a turn signal switch, I'm hoping someone can steer (lol) me in the right direction.

I recently replaced my OEM turn signal switch in my truck with a aftermarket switch. Everything worked well for a few weeks and then it shorted out and melted the wires, (unit on the right). I thought i pinched a wire while tightening things down.

I ordered a second harness from another supplier and installed that one, (unit on the left). Made sure that no wires were pinched or grounded. This one worked fine for a period of time and then it melted like the first unit.

As you can see only the purple and green wire melt, not sure what the wires feed that causes the wires to short out. I dont have a wiring diagram to figure out where they go. The wires do not melt past the point where the aftermarket connector plugs into the OEM connector at the base of the steering column.

I dont want to purchase another harness if this is what is going to happen.

Another thing I want to mention is that I did do the jumper wire modification to allow my parking lights to stay on when the headlights are on. I have since pulled off the jumper wire, do you think this could be the issue?

https://photos.app.goo.gl/7T5v2JqrB32n1TiG7