This a 5.5 hr job, it is hard to replace the dash needs to be pulled, i just did one and not fun, customer would not have heat at times and it was blend door motor , this is located at the top of the heater box and you need to pull dash back to replace and it is still a little hard getting to one of the screws in the rear of the actuator, the heater box does not need to be removed but dash pulled out.
I just bought one myself, on a 97. When cops rip out their equipment they mess up a lot of things so a person has to repair them. Mine was to where no body could get in the truck and couldn't figure out "how" to open it. Some dash lights didn't work, windows didn't work, engine hesitated, etc but only had 123,000 miles on it. All problems fixed now and car is great within two weeks. Yours sounds like you will have to trace "all" your electrical harnasses. That's what I had to do and repair all the damages or buy a whole new harnass for the car front to back.
To see how this is done watch the video of the wiper switch being replaced, as you know the switch operates more than just the wipers, it is the turn signal switch as well. Click the link
The easiest way to do that is to go to your auto parts store and ask for a hanes manual for your make and model it costs 20 to 30 dollars but in the long run any problem you incounter with your vehicle it will give you detailed instructions on how to fix it. Hope this helps.
the idle is factory set, you need to make sure you installed the tps correctly, it fits onto the throttle body with a notch in the switch if its on the notch properly you should be able to turn the switch and feel the switch turn internally before installing the attaching screws, if it has sloted mounts you need to adjust it, if its out of adjustment the idle will drasticly be affected
