Question about 1997 Ford Expedition
Power locks don't work. neither door switches or remote activates the locks. I replaced theGEM module --advice from other mechanics. I did nothing. The fuse is good. Could it be a relay? If so, I don't know which one or where it is. I looked in the jack compartment but didn't see any relay box in there. Please help.
The relays should be on the fuse panel. There is also another fuse and relay box under the hood.
Posted on Apr 20, 2014
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Posted on Jan 02, 2017
If you have a test light or voltmeter I'll try and walk you thru this.
How your system works is the switch has power to it from fuse 19 in the under dash fuse panel(15amp) on the WH/VT wire,this is the same on both switches.
when you go to the lock postion the drivers switch will get power on the VT wire and in the unlock postion it will get power on the LG wire. On the passenger switch in the lock postion it will get power on the PK/YEand in unlock on the PK/LG.
Now this will fed to the GEM module which piggy backs onto the fuse panel.Then the GEM will provide power and ground to the door lock actuators in the door.
Now if you have power leaving the switch like stated I would then remove one of the door panels to access one of the actuators. Then measure voltage and ground at the actuators while you activate the door lock switch.It should have power on one side and ground on the other in one postion then when you go to the other postion on the switch this should switch, previous wire that was hot should now be ground and previous ground should now be hot.
Make sure you test it for ground as well as power you can do this by hooking your test light to a power source instead of ground and when u get a ground of course it will light.
Now the test I just provided will eliminate the door lock switches and the door lock actuators. If you do not have the power and grounds as listed then the problem will be either wiring or GEM module.
Posted on Feb 03, 2009
check fuse 63 first.
Visual Inspection Chart Mechanical Electrical
It could also be your GEM (generic electronic module) which is expensive as it controls a lot of stuff. A scan tool can be used to cehck for fault codes from the GEM.
Posted on Jun 23, 2009
SOURCE: Power windows stopped working
If the power to the illumination and the switches is out in the door, I would say it is a broken wire in the A-pillar to the door on the driver's side.
This is a Light Blue w/ Black stripe wire, it powers both the illumination and the windows themselves.
Posted on Jun 15, 2010
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Passenger front door lock switch
LH rear door lock switch
RH rear door lock switch
LH middle door lock switch (w/ V4U)
RH middle door lock switch (w/ V4U)
Driver door switch assembly (DDSA)
Driver door module (DDM)
Passenger front door module (PDM)
LH rear door module (LRDM)
RH rear door module (RRDM)
Left middle door module (LMDM) (w/ V4U)
Right middle door module (RMDM) (w/ V4U)
Driver door lock actuator
Passenger front door lock actuator
LH rear door lock actuator
RH rear door lock actuator
LH middle door lock actuator (w/V4U)
RH middle door lock actuator (w/ V4U)
Driver door cylinder unlock switch
Rear integration module (RIM)
DRVMDL fuse (10-amp)
PASS MDL fuse (10-amp)
RRDR MDL fuse (10-amp)
Class 2 serial data link
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Doors not getting open with remote or key problem,there are help
links provided below.Click the link below to go through its
procedure and troubleshoot the problem:----
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