Last Nail in the Coffin?
My '97 F150 has had its share of issues over the years. Starting last fall, if I use the keyfob to unlock the door, it gets stuck in a cycle of endlessly locking the door instead (click, click, click...
Forum Discussion
BillyW wrote:
Well, it's been cold and wet/snowy, and I've been pretty busy, so no major work done yet. BUT! I've managed to recreate the original lock cycling problem while the GEM fuse was removed. Could it still be a short to ground in the GEM? The fuse is only on the hot side power to the GEM, right?
I would think that the GEM has only one fuse but you never know..
You could have sticking/stuck/bad relay perhaps.. But after looking at the wiring diagram I am not sure if the relays are at fault..
Door lock wiring diagram
DIAGRAM HERE
Door lock relays appear to be in the “smart junction box” which I suspect is the fuse box directly under the GEM..
From the diagram it appears that the door lock relay coils are hot or powered all the time. The GEM “grounds” (negative going signal) the relay coils to activate the relays. All it would take is a short to ground on the relay coil to engage a relay, water or rust from the relay to ground could create this short.
I am not sure if the door lock relays are replaceable so if you can't find them in the fuse area in the fuse box they may be internal and not replaceable without replacing the fuse box..
