Re: Adding Power Winows
The harness swap is not that bad. So you already have the following wires in your harness; door ajar wires, speaker wires and dome/cargo wires...so all you have to add is the windows and the door locks(if your putting in both). So if you snag the complete harness, and a crewcab harness will work but you have allot of extra wires you won't need(both back windows, locks and door ajar wires...you’ll have to remove them from the harness.
So you'd remove the drivers kick panel and the panel that runs down the driver door panel to the rear doors. All of your wires are in there. So you can cut them at the kick panel, unplug the old harness at the fuse box(on a 02+, I'll have to check on a 99-01) Plug in the new harness, run your wires down to the kick panel, splice the old wires(door ajar, speakers, dome lights) in(use heat shrink connections) After all why run them if there already there. Pull those same wires from your "new" harness since you don't need them now. (you used the old existing wiring). With your new harness plugged into the fuse box, attach/splice the wires you cut for the existing wiring(door ajar etc) together. Then the extra wires in your "new" harness will be needed for your windows and locks in each door. You can run your junkyard "new" harness behind the seats like the factory one or just run it through the dash and over to the passenger side door. Put your extra wires in for the windows and locks and your good to go.
You have to splice allot of wires together...so make sure you use heat shrink. Removing the old harness from the wreck will be tricky since its one big ass harness. There are no connections between the doors and the cab, you have take the door panel off, unhook each of the connectors and pull them through the door and into the cab.
I have to do some checking on a 99, IDK what the differences were, other than the fuse box.
The factory switches are wired kind of goofy so I'd have to check a diagram to see what each of the pins are. I don't see why you couldn’t use them, but I'll bet its cheaper to get a junkyard harness since it will have all of the connectors on the ends of the wires. Its probably worth getting just for the connectors. It would also be nice for the color coded wires to read from the wiring diagram.
I hope this was'nt to confusing, I tend to ramble when typing. If you guys need any help just ask...I'll do what I can.
If you get a truck with VSM it gets more complicated since you have wires and harness' going from the fuse box to the VSM behind the radio.