https://youtu.be/fUoPmhuP6NU
Finally got a chance to do a little more on my truck. Following 88 GMC's instructions I made a harness to make my tow mirrors work when the parking lights are on as well as turn signals.
I took a short video of them working and uploaded it so everyone can see if they'd like.
I still need to tuck the harness out of the way, but I'm happy how they work.
Next on the list is mount my lights in the bumper and wire them up to my Escalade fog light switch.