2008 Dodge Ram 1500 Questions

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Bed of truck has rusted out bad and the 4 wheel drive has guitar working

ok I'm a 26 year auto technician but got a head scratcher here. Got this truck from an auction and upon inspecting why the driver rear window wouldn't roll down (its a quad cab) realized someone had gutted the door, took window motor and regulator assy. got all new componenets and installed them and all windows work except the drivers rear, if you use the rear door switch it will roll the window down but will not roll up and I get no action at all from the NEW master switch. All the little green lamps in the top of the switches are lit and using a power probe, I'm able to watch the voltages swap from one pin to the other at the window motor but it seems like its not applying a ground to complete the circuit when you attempt tp roll the window back up. I cannot find any broken wires and even checked the TIPM for a bad connection and none were found. the problem I'm running into is finding a good diagram, I have all data but the diagram is pretty vague. any help would be greatly appreciated.

We ran battery down. Then a guy jumped us, the car started and quickly died again for three times, like there was no gas. Then guy kept trying to start till the key when turned would not even make a noise when turned to start, nothing happens. He then got under truck and jumped the starter, it cranked fine several tries but engine would not fire like it was getting no gas. I disconnected negative terminal for 20 minutes reconnected and used my fully charged Stanley 300 amp jump starter. Turned key nothing no sound except a load low clunk each time. Tested battery, it showed good, battery is old , terminals were corroded so I cleaned them good with baking soda wash. Reattached tried to jump with Stanley, nothing. Checked all fuses, nothing blown. What do I do? What if I but we battery and still it won't crank?

Hi, i have change the Heather box so i removed the complet dash, cluster, when i reinstall every thing with double cheking, the truck w'ont start, when i put the key at start all the cluster dash lightning Turin off. My batt voltage is, 12.75v. I have no signal at starter so probably something cut.

I have recent lost normal function of my headlights, taillights, blinkers and 4wd. Could this be the tipm?

trying to change head gasket what do i do?

Malfunction indicator light was on and security light

when I turn on my air or my heat I hear a  thump noise but my air and heat works fine afterwards, but it does that every time I turn either one on

Ive changed the throttle body crank and cam sensors. What else could be causing the issue.

OBD2 code P0111

Replaced water pump, thermostat, used recommended coolant mix, truck still gets hot,no leaks, heater works fine, fan is spinning when engine is on, and electric fan works also, truck has 80000 miles

Bulbs are good, fuses good, no visible damage or burned parts visible, no damage to brake light assemblies at all, not been in any major accidents (Scrapes is all) happens 100% of the time during operation