Thanks Pgamboa for the info! Just finished up my passenger tow mirror this evening. I used circuit 7557 for my clearance light hook up. At first the light didn’t work. Turns out the harness from the door to the mirror (where you plug the mirror in) doesn’t have a ground. Easy fix, clip the ground from the mirror plug and throw a small self tap into the door, and bam “let there be light!” YouTube view review coming soon of the ModifyStreet tow mirrors. Here’s a quick view of the final t-tap modification.