Originally Posted by brendanc
I wanted to avoid disassembling the housings. Also didn't think that the wiring inside the housings would match the wiring harness
They generally keep the same wire colors for a particular circuit the same, all the way from the BCM for example, through a couple of connectors, maybe splitting up a few times until it gets to the end component.
Makes it quite useful for tracing when a voltage goes missing.....you measure wire Yellow/Black for example at its source and get voltage. Now you measure the same color wire at its destination and the voltage is missing. So now you go halfway until you find the break.