I suggest you obtain a wiring diagram and understand the circuit before you begin to fault-find or check the exact operation or function in the vehicle handbook.
If a single chime is used for ignition, door and lights there could be a control box...
There are no codes for this. The issue may be that the gem is getting a driver door open signal or the gem itself is bad. I got a used gem at a salvage yard for $20 recently, but make sure its not the door switch first. You can pull the connector off the switch and use an ohmmeter to see if the wire is grounded. If it is, trace it to the gem to find where it is getting cut into.
SOURCE: Location of GEM Module on 1998 Ranger
i am almost sure it is in steering col area by firewall. but call any part store like auto zone and they can print it out and tell you if your ford dealer wont. but on the fords they usualy are all in the drivers steering area sometimes way up by fire wall
SOURCE: need to find out where the GEM module is located
behind the radio on the left side after you remove it
SOURCE: I have residual current draw on 1996 Ford
When checking a draw you have to wait to check till all modules have powered down including Gem module. This can take up to 30 min. Specs are 50 ma draw. To check get you a test light take off the postitive cable, " you can also use a meter", now you have to put the light in series withe the battery and cable. Clamp one side of test light to battery cable the other side to battery post WITH CABLE OFF THE WHOLE TIME. Now if you open doors turn any switches you will have to restart your 30min. then you can check and see if unplugging module, if that fixed problem. what we do is open the doors before, then take a screw driver and close the door latch so that you can get in and out of the car without turning something on
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