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Old 01-25-2010, 08:42 PM   #1 (permalink)
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Our 1996 Taurus GL started intermittently giving the door ajar indicator light and the courtesy lights stay on until the battery saver relay cuts it out. Sometimes it does it, sometimes it act normally. I tried to check if one of the door ajar switches went bad by checking resistance to ground, but could not locate the problem. How common is it for the generic electronic module (GEM) to go bad? I don't plan on giving the stealership the $410 he wants for a new one. Can the GEM be reset (rebooted) by disconnecting the battery? Any comments are appreciated.

Thanks, Jim
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Old 01-25-2010, 10:51 PM   #2 (permalink)
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Common problem. Spray the door latches down with Wd-40, then spray some white lithium grease. Open/close the doors multiple times after applications of each. Remember to check under Topic Finder
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Old 01-26-2010, 06:05 AM   #3 (permalink)
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QUOTE (Bull Geek @ Jan 25 2010, 11:51 PM)
Quote:
Common problem. Spray the door latches down with Wd-40, then spray some white lithium grease. Open/close the doors multiple times after applications of each. Remember to check under Topic Finder [/b]
Thanks, I'll try that. I assume I can spray it in from the outside of the door & don't have to take off the inner panels to spray it from there?

BTW, I did try searching before posting, but nothing came back.

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Old 01-26-2010, 06:32 AM   #4 (permalink)
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QUOTE (jkm3093 @ Jan 26 2010, 07:05 AM)
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QUOTE (Bull Geek @ Jan 25 2010, 11:51 PM)
Quote:
Common problem. Spray the door latches down with Wd-40, then spray some white lithium grease. Open/close the doors multiple times after applications of each. Remember to check under Topic Finder [/b]
Thanks, I'll try that. I assume I can spray it in from the outside of the door & don't have to take off the inner panels to spray it from there?

BTW, I did try searching before posting, but nothing came back.
[/b][/quote]
Yea just spray right onto/into the latch mechanism inside the door. Door panel removal is un-necessary.
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Old 01-26-2010, 09:09 PM   #5 (permalink)
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I dnt know if your problem is fixed yet...but my dad had the exact same prob when he owned his 97 taurus GL...he had to change the courtesy light switch in both front doors, the prob was the switches would stick open....unfortunately this involves removing the door panel to get to the whole door latch/actuator assembly since the switch is in there, but hopefully sprayin lube will help it....it looks like this to give you an idea http://info.rockauto.com/Motorcraft/...tml?SW5195.jpg
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Old 01-27-2010, 06:21 AM   #6 (permalink)
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QUOTE (NoBull5393 @ Jan 26 2010, 10:09 PM)
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I dnt know if your problem is fixed yet...but my dad had the exact same prob when he owned his 97 taurus GL...he had to change the courtesy light switch in both front doors, the prob was the switches would stick open....unfortunately this involves removing the door panel to get to the whole door latch/actuator assembly since the switch is in there, but hopefully sprayin lube will help it....it looks like this to give you an idea http://info.rockauto.com/Motorcraft/...tml?SW5195.jpg[/b]
I haven't had a chance to spray the latches yet. That's next. I also strongly suspect the driver's door ajar switch and already had the inner panel off. I couldn't reach the switch connector to take it off, so I unbolted the latch mechanism but couldn't pull it out without a major disassembly of the window tracks, mechanism, etc. So I gave up on that & buttoned it back up.

I have the service manual with wiring diagrams, connector pin outs, etc. Next I disconnected the connectors at the GEM (located at the fuse junction box under the dash) & tried to check continuity to ground for the various door switches (they provide ground signals to the GEM when the door is open). But, I couldn't get the signals to change to closed state (I already found mistakes in the manual and may have been chasing the wrong wires). I'm pretty frustrated that I haven't pinned the problem down yet after several hours trying.

In the end it's either the switch sticking like Bull Geek said, bad switch, or a bad GEM. I hope Bull Geek is right! I'll post again when I know more. Thanks for everyone's input.
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Old 01-27-2010, 08:55 AM   #7 (permalink)
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Bull Geek is probably 99.9% right on this....That one issue has probably brought more new members here than any other one.
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Old 01-28-2010, 06:22 AM   #8 (permalink)
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QUOTE (fonicsmonkey @ Jan 27 2010, 09:55 AM)
Quote:
Bull Geek is probably 99.9% right on this....That one issue has probably brought more new members here than any other one.[/b]
I wouldn't doubt that one bit - So I went to check the problem again but it was working normally. I sprayed down the latches as Bull Geek suggested, and it is still fine. Being intermittent reinforces that it was only a sticking problem. Hopefully problem solved!!!
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Old 02-01-2010, 12:14 PM   #9 (permalink)
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Well, 5 days later and still no problem - it looks like problem solved!
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Old 02-05-2010, 06:21 PM   #10 (permalink)
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Glad to hear your problem went away. This has happened to me last winter and again this winter.

I had a "bad" switch in the front passenger door over the Holidays that forced me to replace the switch.

The previous winter I had the "door ajar" light go on several times......walking around the car and checking the doors pointed to the same door each time. Advice from this site helped get me through the winter without it reoccurring.

A month ago it happened again..... but would not stop by the lube method .....so I took it in for repair. Mechanic couldn't identify which door had the problem so I took a chance and had them replace the front passenger switch.

Cost was $20 for the part and $70 for the labor. Mechanic said the replacement switch was a new design with a rubber type sleeve to stop moisture from getting in.

Problem went away completely.

Mechanic mentioned that the switch was incased in ice (we had periods of rain and snow over the holidays).

Should I be looking for leaks around the Window seal??

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