2003 Dodge Ram, Wire Colors Do Not Match

Hi, thanks for letting me join. I’m having a problem with my 2003 Dodge RAM 5.7 Hemi. I want to install an Excalibur alarm system with remote start, but I can't find the necessary wires. I’ve looked up quite a few wiring diagrams and specs covering the 2002–2005 model years, but none of the diagrams match the wiring on my truck. For example, the power lock wire is supposed to be purple/dark green. I don't have a wire of that color at all; instead, it works with a white/green wire. The wire colors at the ignition switch don't match either, and I can't find a single wire for the door switches. Does anyone have any advice?

Lookup the factory diagrams and go by pin locations: https://lemon-manuals.la/

Looks like I found the problem. The wire colors do match after all, but only *inside* the door. That’s where I can find the wires for the door switches, but they change at the connectors in the A- and B-pillars. I wonder who came up with such nonsense.