Finding Circuits for Installing Pop and Lock Tailgate Lock

Updated 12/30/2025 | Published 12/27/2025

Products Featured in This Question

Pop & Lock Custom Tailgate Lock - Power - Black

(471)

$117.18

Hook Probe Circuit Tester

(62)

$13.33

Quick Splices - Self-Stripping Connector - Closed Port - 18-22 Gauge - Red - Qty 1

(56)

$1.95

Question:

Using this product with a 2012 Pro-4X king cab. Wiring in-cab is the question: Have to go to the front of the passenger door. No pillar/wiring for rear door on the king cab. The two connectors shown below appear to come from the door. entering connectors shown from the left side of the photo. Top group of wires seem larger gaugelikely to carry solenoid currents. I am worried about which wires to tap, and physically separating the wires to connect to. Car-repair yoga to reach the wires does not make the job any easier... Any tips which wires/wire colors to connect to and how to best make the physical connection? There is a purple no visible gray. There is dark green w/ yellow stripand others. Thinking Ill pop off the door panel and try to see which wires are actually connected to the lock actuator in the door. Not sure if that will help or work. Any tips you have would help. Also: There are no wires near the tailgate handle. In fact, no wires entering tailgate along hinge end. Planning to drill+grommet the wire through gate.

asked by: William M

Wiring Harness
(click to enlarge)

Expert Reply:

Hey William, if you are unsure of the wire functions/colors I would recommend using a test light like our part # PTW2993 which comes with a hook and probe you can use to verify the functions easily without damaging anything. This will allow you to for sure know what circuits you are testing. Then for making the connections quick splice scotch locks aren't a bad choice as long as you get the appropriate gauge connectors for the wire gauge.

We have quick splices too like the part # SWC502885-1 which is for between 18 and 22 gauge wire.

expert reply by: Jameson C