3/18/2021 0 Comments Third Wire Mods
No need to pull the OEM cargo light switch or use any fuse box wire taps.This is the only video I have been able to find with the circuit to the cargobed light: (see pic below of tapping into wiring harness by drivers door) Im hoping I can find someone who knows the wiring diagram to that third brake light cargo light to tap into it either in the tail lights, towing harness or inside the cab, closer to the bed.Definitely dont want to have to remove the rear seat headliner to tap into the third brake light.
Third Wire Mods Upgrade For EvenAny suggestions are greatly appreciated as I am sure there are a ton of us that would add this upgrade for even greater bed lighting.Direct link. The search function is very useful, and it helps keep threads from being repeated. Disagree with the usefulness of the search function though (this isnt me starting a pissing contest). I installed the factory bed lights and want to run them off the OEM cab light switch like the OP. The directions state to tap in to a green wire and ground to a black and white wire with a picture very similar to OPs above. Searching here didnt reveal ANY good info on where the elusive green wire actually is, and the ground plug contains quite a few black and white wires. Pulling the kick panel revealed lots of white plugs and green wires and I didnt want to be like another member here burning up a lot of green wire insulation to probe which wire was the real one. He failed, BTW. Found that thread using search as well. But. the vaunted search Never. Wire. Was. The. Right. One. My lights still dont work and Im about ready to just order a switch and wire directly to 12v. Im afraid to try Cornelius blue wire solution since it doesnt go through a relay and I dont want to blow out the computer like the mapdome light LED guys. So. long story short. To make this work, we should be able to: 1.) Combine the aftermarket 12V truck bed lights Positive () wires to an 7.5-10 Amp Add a Circuit as pictured below into an available fuse slot in the drivers fuse box: ----- 2.) And then combine the auxiliary bed lights the Negative (-) wiring and tap into the Blue wire behind the factory cargo light rocker switch. Third Wire Mods Manual Switching OnFound another thread identifying this as correct: - Anyone else do this same method Seems to be the cleanest so all bed lights work with cargo light automatically or by manual switching on or off. You run your positive wires to the fuse box using an add a fuse. I understand your concern about not wanting to tap the wire and wanting to use a relay. In the thread, there are wiring diagrams that show how to wire up a relay harness.
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