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Old May 14, 2015 | 09:04 PM
  #1  
Danny Fry's Avatar
Danny Fry
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Default twilight sentinel

I recently traded my '01 coupe for an '03 50th anniversary convertible. The only thing that didn't work on the car was the twilight sentinel. I saw that the sensor had come out of the defroster vent an was laying on the wiring harness below it. I pulled the defroster vent out (breaking some of the vanes in the process) and put it back where it belonged. It worked perfectly for 2 weeks. Then, one day the lights stayed on after I pulled out of the garage, and they haven't worked correctly ever since. I had to disable twilight sentinel in the DIC. I know there is a lot of knowledge out there. Can anyone give me an answer to this or a place to start?
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Old May 15, 2015 | 08:44 AM
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Could be a number of things. First, pull your DIC codes and see what may be going on since there are a couple of codes the light sensor circuit can throw.

Most often it is the actual sensor.
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Old May 15, 2015 | 09:35 AM
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Danny Fry
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Already thought of that. The new sensor is not that expensive, so I already replaced it. Unbelievably, there are no fault codes showing up in the DIC at all.
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Old May 15, 2015 | 11:17 AM
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May be the MF switch contact in the OFF position is not providing continuity to allow the circuit to work. That or the BCM is at issue. Could also be a wiring/connector issue.

If you want to do some do some circuit checks I can provide you with the schematics for everything.

Might try exercising the MF switch a couple dozen times to wipe the contacts and see if that helps at all.
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Old May 15, 2015 | 11:59 AM
  #5  
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I'll try the MF switch first. If that doesn't work, I may want those schematics. Thanks
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Old May 15, 2015 | 03:40 PM
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Danny Fry
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Toggling the MF switch 7 or 8 times with the twilight sentinel turned on did the trick. Thanks a lot.
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