02 TUARUS LX DOOR AJAR AND CHECK ENGINE LIGHT ON AND THEN OFF

  • Tiny
  • banjomaniac
  • 2002 Ford Taurus
  • 49,000 miles

OK, I just got this car 2 weeks ago and it seems to run fine and rides great, looks new. After a few days I got in started the car and saw the check engine light and door ajar light on. I tried opening and shutting all the doors and trunk but still had the light. I drove it home, 20 miles, and still had the lights. I used my scanner and it has no codes so I thought I'll look at it tomorrow. I got in to go to work and the lights were not on and noticed that the door ajar light doesn't seem to work when my doors are open so I'm at a loss. They have since came back on and been on for 2 days straight, both lights. Any ideas cause I think something screwy with a module or electrical.

Thanks

Monday, March 19th, 2012 AT 12:29 PM

12 Answers

  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

Check all the door switches for proper operations and possible shorting. Try manually pushing each door switch individually to see if there are any changes. If the light flickers with door switch operations, you could have a fault with the Body Control Module.

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Monday, March 19th, 2012 AT 12:45 PM
  • Tiny
  • banjomaniac
  • Member

I should add that the dome light isn't on when the light is on and thought it was strange that the check engine light and door ajar light come on and go off together, that doesn't sound right. What does the door ajar light have to do with check engine? When the light was out the other day I even left the drivers door open and drove some and no light, walked around the car and opened every door and no light BUT it chimes when I open the door? Sounds like this is going to be tough to figure out.
Thanks for the suggestion.

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Monday, March 19th, 2012 AT 12:55 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

This could only mean a fault with the Generic Electric Module (GEM). GEt a scan done to check if any trouble codes are present.

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Monday, March 19th, 2012 AT 5:05 PM
  • Tiny
  • banjomaniac
  • Member

Well now I see that when I turn on my headlights, the check engine and door ajar lights go out and I can dimm the headlights and they come back on so maybe it's in the instrument cluster?

Thanks, banjomaniac

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Thursday, April 5th, 2012 AT 11:49 AM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

It could be or the GEM. It could also be due to a poor ground circuit connection.

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Thursday, April 5th, 2012 AT 3:43 PM
  • Tiny
  • banjomaniac
  • Member

OK, I got up with a ford expert who does wiring and all that and he told me that there is a connector on the cluster that those 2 lamps share so his best guess is pull the cluster and check the connecter at both ends of the harness and the cluster itself could be cracked and just flexing it might caus it to come and go so I think that is where I'll start.

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Friday, April 6th, 2012 AT 1:48 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

Wiring problems are always hard to pinpoint and when you have a starting point, cross your fingers and hope that is the right spot to get started with.

Good luck.

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Friday, April 6th, 2012 AT 2:08 PM
  • Tiny
  • banjomaniac
  • Member

I don't see how only 2 of the warning lights can be lit if there was a ground or wire problem. I have the check engine and door ajar light on all the time. Found out last night that with the car off and key out, I turn on the headlight switch and the check engine and door ajar lights both come on. I pulled the headlight switch but couldn't find a problem there, also found out that when I turn on headlight switch the temp guage goes up, even if the car is cold? It goes up to the first line or just past it, so it is getting power when I turn on the headlight switch?

Banjomaniac

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Tuesday, April 10th, 2012 AT 5:13 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

You definitely have a bad grounding circuit or a fault with the GEM. When using the headlights, there is insufficent ground for the circuit and it is using the door ajar and other indicator lights to ground the crcuit.

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Wednesday, April 11th, 2012 AT 12:31 PM
  • Tiny
  • banjomaniac
  • Member

FIXED! I pulled the cluster and the copper leads that run under the 16 wire connecter were slid over together and the illumination, check engine and door ajar were all touching. I pulled them up and straightened them and all is good.

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Wednesday, April 11th, 2012 AT 7:55 PM

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