03 crew cab manual swap wiring issues

Hello , I have gotten myself into a manual swap on my friends crew cab utilizing all electronics and computer from a 2000 model. The harnesses have subtle differences , but I just swapped the HVAC , along with all the harnesses to make it work , and just figure out wiring for the doors ..

As it turns out the rear taillight and fuel pump harness has a different connector as well , and rather than pulling tank ,and all that , I figure I would just splice the 2 plugs from 00' harness into the single plug on the 03' truck ..

Was wondering if anyone could help me , I am looking for wiring diagrams for both 00', and 03' tiallights , fuel pump , level sender , and locker actuator .

Also any other diagrams regarding the doors would also help me lots ..

If it was me I wouldn't have done the swap using 2000 truck due to wiring differences, but the owner didn't care , and said just do whatever it takes..

Thanks for any support