New to this forum. Maybe someone has experienced this same issue and knows how to resolve it.
I noticed my battery went dead on the truck, charged battery, everything seemed fine. 3 days later dead again. Charge battery, start truck and notice the door ajar light is on and the dome lights/door lights are on even with the doors closed. So as a quick "fix" to keep the battery from going dead, I pulled the fuse to the dome lights. That worked, but the door agar light stays on anytime the key is on. I figure that is normal. So a few weeks later I decided to look into this issue further. I started puling door panels starting with the drivers door, the one that gets the most use, and started unplugging the door latch switch's. I got to the passenger front door and pulled the door latch switch wire connector and the dome lights went off and the door ajar light went off. So I figured it just needs a new door latch assembly. Fine, i will replace that another day. Anyway, 3 weeks go by, no issues and then suddenly the dome lights come back on and the door ajar light comes back on. So I figure another door latch switch is bad. So, I pull the remaining 3 door latch switch wire connectors but the doom light are still on and the door ajar light is still on. So pulled the fuse again. Now what? I can hear a relay click when I take the fuse in and out, but it appears that this relay is on the backside of the fuse box? Any other ideas? I don't have a wire diagram, so not sure where to go next.
BTW, at about the same time as all this first happened, the fuel gauge quit working. I just assume that it was the sender in the tank, but maybe related to the door ajar light being on in the dash???
Thanks

 

This might require some detailed checking for a grounded wire sending a false signal that a door is opened.
This should be ruled out before replacing any parts...