Wiper acting stupid

All good thoughts but I’ve still got this issue and it’s rain season here in LA and my wiper symptoms have gotten worse. What I find weird is that my lights go out for every click when I have the wipers on. Why is that? I have gone under the dash to look for a short somewhere but the wiring is a mess since I have no cluster so there’s random wires just hanging not connected to anything.

That is starting to sound more like grounding. I would start with checking the ground strap in the wiper itself. Remove that nut and pull the barrel out of the rubber grommet. Clean the surfaces. The motor gets ground through that strap, to the nut/barrel to the firewall. Then make sure there is a strap from the back of the drivers side head to the fire wall, clean those connections. Then clean the connection on the radiator support where the battery cable and headlight harness bolt to it. I have not gotten to the dash harness on mine so I am not sure where the ground are there. There a short jumper between the steering column and one of the nuts that bolts the column bracket to the under dash support. Also typically the connection between the dash and body is a current carrying path. The bolts on each side of the dash above the kick panels clean and tighten them.