I got a 1999 Jeep xj in excellent condition with under 130k miles on it December 2018. Very recently, as in the past week or two, there's been an extremely annoying issue with the door locks and window switches. First of all, I'll start by saying the only electrical modifications done to the car are an aftermarket stereo, speakers, amplifier, and subwoofer. I took every precaution to make sure I didn't nick any wires or anything to mess up the other systems of the car. That was several months ago, and I'd never had a single issue with the car like this one now. Basically, the door locks automatically trigger themselves seemingly at random. I tried removing the remote door lock key fob from my key chain and driving around to see if it was the issue, but I wouldn't be posting on here if that was as simple as it got. While the car is off or with the engine running, all of the door locks will randomly, at different intervals, start triggering at an insane rate. But they're ONLY UNlocking. Also, while it's having the issue, the window switches will trigger the door locks to unlock and the actual door lock switches or key fob buttons do nothing. When I spam the window switches for about a minute, it starts working again. Sometimes I'll go to work and lock my car, then come back and it's all unlocked.

This issue only started very recently, and where I live it's right at the time where it started getting really hot out, and the car would basically be an oven. I installed the speaker system last winter and had 0 issues until now. I've heard of replacing fuses in the main fuse panel or replacing the master window switch assembly, but don't want to spend a bunch of money with no success. Please help by sharing your own experiences/successes

Most of the issues I've read say that their windows or door locks don't work, but not that the window switches actually trigger the door locks. Keep that in mind, that this one is slightly different.