Sun Roof Cycle on vehicle off

I haven’t seen this on any thread or any form anywhere. My sunroof cycles every time I turn the truck off. Not fully open and closed but just tilt down up, down up, down up, then finished closed. The truck came with an aftermarket switch installed but I’m unsure how to fix this weird thing going on. Any ideas? I don’t want to buy a whole new switch and light piece but would have to to go back to factory.

 

Pull the fuse.

 

Well here is the crazy part I did and the roof still cycles

 

That's not good. That obviously means you've got 12V DC coming direct from the battery. I guess I would look into the switch next. See if it can be disconnected there. I would then trace the wiring back to wherever it was spliced into and eliminate that. You might lose functionality of your sunroof, but I think I would be ok with that. Hopefully you don't discover a completely hacked up harness. I'm sure there are folks on here that have better insights than I do. I admit wiring is not my forte.

 

If someone replaced the switch, I'd be asking myself "why" and then "what else did they replace"?

My guess is this:

• Sunroof stopped working
• PO thought the switch failed, then replaced it
• That didn't fix it, so they probably hardwired the sunroof, either directly, or teeing off another connection that typically cycles when you power off

I think the only way you're gonna solve this mystery is by carefully inspecting in/around your fusebox in the dash for spliced wires, and dropping down the overhead console and looking for splices in there.

I don't remember if there's a separate fuse feeding the circuit of the sunroof inside the fuse/relay box in the engine bay or not. But if I were you ... I'd be worried whether or not something we bring up in the things you must know megathread was happening and that took out that circuit, or is causing your unexpected behavior (see red text and those pic links), usually when people are having weird electrical shit, that's the issue:

• These trucks usually don't have a ton of other electrical issues. Hidden corrosion inside the battery/alt cables happens. Sometimes, a couple thousand miles after timing belt changes, people will have startup issues because the crank position sensor wasn't properly tucked away and gets rubbed by a belt (pic). There's also a similar problem with camshaft position sensor under the cam cover, where the belt will rub through (pics). There's the rodent issues mentioned earlier. Occasionally, water leaks can send water down into the ECM behind the glovebox (pics), or into the fusebox inside the cab/dash (pics & pics & pics, it happens a LOT). Many drain/vampire issues trace back to aftermarket add-ons whether the owner knows they exist or not - alarms as mentioned earlier, brake controllers, poorly installed trailer receptacles, those are some big ones.

 

So turns out someone tapped into it on the fuse panel no hacked harness and still run through a fuse. I pulled it to reset the sub roof, pulled the glass and adjusted the sliders and re initialized the after market switch and it works perfect so I guess we will see in the long haul

 

Got pics of the hackery, in case it may help the next person?