All four of my windows stopped working and the power lock on the driver side as well.

Its in the drivers master switch or the wiring in between the he door and the body in the rubber boot. What kind of work was done while it was at the garage?

Did you resolve? How? I'm in the same boat, would love to fix.... Thanks!

I know this is pretty much dead but this is still happening to people. I work at a shop and had one of these things come in just recently. after going through just about everything, i decided to check wire continuity to each wire going into the door. Long story short, I think the window on this thing hits the main wire harness that comes into the door. It's popped out of the normal holder that holds it to the door and the MAIN ground wire was literally pulled in half right in the rubber boot between the car and door. Run a new main ground wire (large guage black wire on the window switch connector) from inside the car to inside the door to the connector on the window control switches. Make sure to route it AROUND the window track as i think this was the issue in the first place and everything should go back to normal. One more thing, I don't recommend grounding directly to the door as it doesnt seem to have a good ground. Grounding directly does work but you would probably have to ground the door to the normal frame to get a good enough ground for it to work. Good luck and hope this helps.

Well I just fixed mine today with almost the same problem. Locks and Power Mirror worked I couldn't raise or lower any window from the Master Power Window switch on the drivers door. Trouble shot all the circuits and found no power getting from the Power Window relay to the door Master switch. Turns out the power wire had broken between the door and body in the rubber boot. I took the door off and checked the harness, glad I did, besides a completely broken power wire 5 other wires were cracked and would be breaking soon. I spliced and soldered in 6 wires total. Everything works fine now but what upsets me is that my Endeavor is a 2011, only 6 years old. Cheap and brittle wire I guess.

Terry was right on the nose with my problem. Black ground wire broken in between door and main body. A real pain to fix that took me about 3 hours to locate the break and snake a wire in for splicing, but it's done and I'm happy.

I kind of have the same problem, when I try to lower the window all I get is a buzzing sound on the rivers window switch. Cannot roll any windows down from any switch, even the actual back door switches don't work. Would the above fix also work for my issue?? Any help would be appreciated.

oh my - this just happened to my endeavor last week. Guess I"m taking it in to fix since it sounds complicated

Mine sounds a little different , ? my power locks work , but all '4' windows will not go down or up unless the driver door is wide open, than they work fine .. any thoughts all??

Mark, Same happened to mine, it's the wiring harness....UGH Mitsubishi charged me 432.00 USD to replace and they work fine now...... PS: my car was only 6yrs old.......

Can you tell me exactly the Wiring harness name, so I can get it ordered??

All they wrote on the invoice was wiring harness. Look up JC Whitney, they have all the parts, just elect your vehicle and search parts

Thanks for the comments! My ‘05 Endeavor had 3 broken wires on driver side door, one was the ground, other two were windows. After splicing the cables with new extensions, everything worked fine. I did have to remove door, door cover, unplug lock and window connectors, to reach the rubber sleeve that cover the wires entering door. I was going to run a new ground cable to at least get locks to work but in the process of taking parts apart I found the broken wires inside the rubber sleeve. Thanks again for the solution!!!