My sunroof apparently leaked onto my fuse box under the dash.(the parking lights were on and wouldn’t go off without disconnecting the battery) I pulled it and dried it out, cleaned some light corrosion. There doesn’t seem to be any damage to it and I don’t see any fried wires. My question is if I lube it up with dielectric grease, should it be good to go?

 

To your point, it should be good to go. Personally, I wouldn't use grease because it collects dust.

If your lights stay on, it means there is a problem with the relay (e.g. welded contacts) or switch circuit, not the fuse box.

Drain tubes need to go somewhere. Ours go by the fuse box (and relays). If water leaks, the tube is probably bad. One more reason to clean and seal up the sun roofs with caulk, I'd say. There's another potential leak path at the windshield corner. Fix the leak to cure the root cause.

 

@JohnZo I've got this going on too. Where exactly does the windshield leak? Can I see the sunroof drain tube if I pull the fender?

 

Drain tube for the front sunroof is routed inside on driver's side LHD. Easiest access is the A pillar trim panel (pull straight towards center of truck). Difficult access by removing the headliner (I found leaks there caused headliner fabric to detach). The catch pan has a glued on fitting, and the glue can fail. The tube routes down under left side kick panel under dash as I recall, then out.

I have seen threads about windshield leaks at upper corners. And at the ventilation air vent. But I haven't experienced those.