The rear window will not roll down. I don't think I have connection to it because nothing is happening at all. Both electric windows move down too slow. There is no dome light. Only one speaker works. There are no fully illuminated gauges in the cluster. I can barely make out speed while driving at night.
It appears that I might just need to start redoing all the electrical which I am not looking forward to. Painless wiring harness? Anyone have a difficulty assessment with the wiring harness replacement? I'm not good with electrical so if there is a good book for the noob great. I also want to get that dash from diy4x. Maybe time to pony up the coin.
Until later, Beer time...
Rear window you need to search on, there is a little wire in the back that prevents the window from rolling up or down when the tailgate is down, cut that wire, connect to itself. The switch is more than likely bad.
Dash lights, disassemble dash put new lights in, put LEDs in if you want super bright, the fully lit fully functioning dash lights do not spread the light evenly but bright enough to read everything.
Dome light could be alot of things, the switches in the doors could be bad, fuse, disconnected etc. Took me about an hour to figure mine out.
Windows going up and down slow is well an issue get used to it. I remember some of these trucks brand new, the power windows were not speedy. Lube the tracks up and I bet it makes a huge difference.
Remember the painless harness and other replacement harnesses replace the wiring, it sounds like most of your problems are not the wiring but what is connected to the wiring. So a harness will not solve any problems at all.
Electrical kind of sucks but its not that hard. Take your time fix things one at a time. Buy a good multimeter and figure out how to use it.
I don't think a replacement harness will fix a single problem you are currently having