We did a couple of things incorrectly at first, and later fixed the mistake, so I will detail generally what’s going on but I may not have pictures for some of it… Also this How-to is going to be written from the perspective of an idiot (me) and my much smarter buddy @SkeeLo22 will probably laugh at the explanation, but I’ll assume that most of us aren’t wiring gurus, so here we go. Also included is a VERY rudimentary pictorial drawing of the wiring…
Step 1: Run 2 x 18 - 22 AWG wires through the grommet connecting the driver front door to the body… this is a pain in the a$$ in general but it’s a necessary step to eliminate 2 separate connection points in our 33 year old wiring harnesses that seem to be a big reason your door locks don’t work as well as they should in the first place
Step 2: In the door, there are 2 x connections for your master window/door locks switch… you can disconnect the switch and put it aside for the time being
Step 3: The smaller plug contains 4 x wires (B/R, B/W, Red, White)… about 3” before the plug, CUT the B/R, B/W, and the White wires. The cut white wire will remain cut, so you can heat shrink both of the cut ends. I will refer to the Plug-end being the cut side that goes into the plug and the Body-end being the side that goes into the door grommet… The Body-end of the B/R and B/W will also not be used… so you can heat shrink both of those cut ends.
Step 4: From the Plug-end of both, the B/R and B/W, you will solder a diode (1n4001 or similar - we used 1n4002 because that’s what we had) facing the direction of the body AND attaching one of the 18-22 AWG wires that you ran in Step 1.