Power Door Lock Issue - Ford Powerstroke Diesel Forum
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Old 03-23-2011, 11:33 AM
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Power Door Lock Issue

G'day, new member here, 1st post.

My '05 F250 Crew has a door lock issue. I can both lock and unlock the doors w/ the key fob and the exterior button panel, all fine there. However, only the LOCK functions on the interior switches, both driver and passenger sides, neither side interior switch will unlock the doors.

Any suggestions on what's going on? Any electrical diagrams available?

Thanks in advance, Mark
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Old 03-23-2011, 11:41 AM
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- Glad you found PSO!!

Suggestions: (easiest first)

First: Pull the driver's door switch control to see if a wire has broken off the back of the lock/unlock switch.
Second: If the wire is still attached there, look at the wire color and check that wire where it transistions from the door to the body. Sometimes wires can break in there because the door opens/closes.
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Old 03-23-2011, 01:22 PM
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Quote:
Originally Posted by SuperCrutyPS View Post
- Glad you found PSO!!

Suggestions: (easiest first)

First: Pull the driver's door switch control to see if a wire has broken off the back of the lock/unlock switch.
Second: If the wire is still attached there, look at the wire color and check that wire where it transistions from the door to the body. Sometimes wires can break in there because the door opens/closes.
Thanks for the repsonse, SPCS.

Done that: removed the switch panel, nothing obviously disconnected. I couldn't determine which wire was for UNLOCK function. IIRC, there were upwards of 6 wires on that switch, at least 4 of 'em, and had no way of determining which is for what function.

Is there a wiring diagram available somewhere?

Mark
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Old 03-25-2011, 12:33 PM
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Well, I've been able to find "something", but I'm not there yet. From a car alarm/remote start website, I found out that most body power functions (windows doorlocks, chimes, etc.) are controlled by the GEM Module (sic), which I beleive stands for Generic Electronics Module. Wires from the door armrest-mounted switches to to the GEM (Lock wire: white/red, Unlock wire:Black/white, Door Ajar: either yellow/black or yellow/gray). Allegedly in parallel with these wires are wires from the KEYLESS ENTRY MODULE, which apparently outputs a ground signal onto the GEM's Lock and Unlock wires.

Can anyone help me locate these two modules: GEM and KEYLESS ENTRY modules?

thanks, Mark
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