air cond.problem need wiring diagram gm

new user and thanks for having me

problem is with my 2003 gmc yukon 5.3l v8 not the flex fuel model slt 4x4

air conditioner wiring harness was wrapped under the control arm,i was told this happened on some vehicles from the factory when the engine was installed.anyway this is what happened

the wires to compressor and switches broke ive since repaired the wires and have not been able to get the system running

replaced the hvac modular inside the truck,had a line through the "snowflake"when the original break in the wires must have signaled the problem.replaced with a used one since repair and the "snowflake"is in its normal state,no line through it.

have power to the switch up at firewall condensor pressure switch

do not have power at the compressor plug.replaced the plug due to wear.

do not have any voltage at the plug or switch on the lower line down by the compressor

clutch on compressor rotates by hand,tried jumping the pressure switch that has power and dosent start the system.i figured it wouldnt but had to try.i did have the system charged at a honda shop hoping a vacum and new refrigerent would start the system up.no luck but do have correct freon.the honda shop didnt have any gm computers or much knowledge on the system.had this done there due to friend owing me a favor. does anyone know if i need a reprogram. does anyone have a wiring diagram for my truck.

need help thanks

now i havent looked at the vac where and how ,

i thank you very much!