Why not just buy these? I think they are like $40-50 each roughly
(2) 68396013AB - tail light jumper cable connector
Well, I have three reasons.
1. I'm cheap
2. I wouldn't end up being able to throw away the old harnesses, so I would end up with more stuff in my garage
3. I have a lot of experience in designing and building wiring harnesses
I updated the harness with the following wiring, and it worked fine
Tail light pin is the first number, the body side pin is the last number
Taillight Body
1 * REAR PARK LAMP WH/OG 4
2 * STOP LAMP WH/GN 2
3 * TURN LAMP WH/YE 8
4 * BACKUP LAMP WH/VT 7
5 * GROUND BK 10
6 NO CONTACT 5
7 * LIGHTING FAULT SENSE WH/BG 11
8 GND/NO CONTACT (select) (Black) 12
9 RUN RELAY CONTROL PK/YE (Yellow) 1
10 CAN IHS (+) DG/WH (Blue) 3
11 CAN IHS (-) WH (White) 9
12 GROUND BK 10
* in existing harness
I used:
Pin for tail light side Molex 33012-2003
Pin for the body side TE connectivity 7-1452668-1
Seal for body side TE Connectivity 964972-1
Since the tail light side needs two ground pins, and the body only has one ground, I needed to splice into the existing black wire going to tail light pin 5, and run a wire from the splice to pin 12 on the tail light side.