Longtime lurker, first time poster.
I've seen a few posts on installing a third brake light and separate ones on a cargo lamp, but I hadn't really seen one on doing a combination that answered my questions. I saw one that was for a topper, but not the cargo lamp area.
Ultimately, I want the cargo lamp to hook up to a (to be installed) OEM cargo lamp switch in the dash, but then use an aftermarket third brake light/cargo lamp combo over the bed. I've seen a few OEM ones from an old Ford Ranger, but I think I'll stick with something newer for simplicity's sake.
A couple open ended concerns and various questions:
I've seen it mentioned I may need a third brake light logic module. Is this just if I'm tapping into the taillights? I'm not sure what's going to be more difficult: tapping into the brake pedal switch or the tail lights. I imagine running something in the cabin would be easier than going all the way to the rear of the truck.
I saw there were issues with the third brake light flashing when you tap the brake. How do I make sure it's running whenever the lights are on? Should I use the module and tap into the brake pedal and the front headlights so it knows when to turn on? Then separately wire and ground the cargo lamp?
This truck has been a learning hobby and I'm very new, so feel free to correct me where I'm not making sense or even asking the wrong questions. I may just give up and do a factory cargo lamp only, but I think having some extra safety from rear ends in a non-airbag vehicle + cell phone distracted drivers may be helpful. I attached a couple photos of the parts I'm considering.
TIA!