99 mountaineer power locks on the fritz

[numbsun]

This morning my mountaineer kept sounding like it was cycling lock-unlock and so on all the way to work, and continued for a minute before quitting when I got out of it. Then after hitting the lock button on the keyless entry, it did this again for a while. When it quit, I tried locking it with a switch inside the vehicle, with the same result. So right now it's manually locked and hopefully not unlocking itself. I bought this used and it has no manual with it, so I don't even know which fuse it would be to pull to make it stop. Any suggestions any of you have would be helpful.

Thank you in advance.

 

[dogfriend]

It sounds like you may have a bad door lock/unlock relay. The relays are located behind the drivers side trim piece in the rear of the truck.

You can get a Ford CD Repair Manual from Ebay or you may be able to download the ISO image here