Exterior mirrors and interior lights not working?

Tiny
LINCOLN2001
  • MEMBER
  • 2001 LINCOLN TOWN CAR
  • V8
  • 2WD
  • AUTOMATIC
  • 67,000 MILES
Suddenly, all at the same time, power outside mirrors both stop working, interior lights do not work when open door, and radio does shut off when open door. I have examined all the fuses.
Wednesday, July 19th, 2023 AT 9:18 PM

7 Replies

Tiny
LINCOLN2001
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  • 4 POSTS
I meant to say the radio does not shut off when open door.
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Wednesday, July 19th, 2023 AT 9:26 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,560 POSTS
Hi,

The circuits you mentioned are not tied together, so I am a little confused at this point. Do me a favor. I attached two pics below. Pic 1 shows the fuses related to the interior courtesy lighting. Pic 2 is for the exterior mirrors. Check the fuses to see if they are good. Additionally, make sure there is power to and from them.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

As far as the radio not turning off, I suspect that is related to the same thing causing the interior lighting issue. It seems the circuit doesn't realize the door has been opened.

Let me know about the fuses.

Take care,

Joe

See pics below.
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Friday, July 21st, 2023 AT 8:09 PM
Tiny
LINCOLN2001
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Hello, thanks for your answer. I will contact you as soon as I check the fuses you described.
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Saturday, July 22nd, 2023 AT 8:27 AM
Tiny
LINCOLN2001
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Sorry I took so long to respond as I have been away. I checked the fuses, and they seem to be good.
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Thursday, August 3rd, 2023 AT 3:42 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

Were you able to check if there was power available at the fuses? The fuse could be good but has no power.

Also, since the radio isn't turning off as well as the interior lights aren't turning on when the door is opened, that indicates an electrical issue with the door switches. Since we lost the exterior mirror operation at the same time, I suspect we lost power. That is why I'm asking if you checked for power to and from the fuses.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Let me know.

Joe
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Thursday, August 3rd, 2023 AT 9:11 PM
Tiny
LINCOLN2001
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The fuses all had power to them. I wonder if this could be caused by the Driver Door Module.

I also wonder if this could be a problem in the fuse box under the hood, as I have only checked the fuses under the dash. Thank you.
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Thursday, August 3rd, 2023 AT 10:05 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,560 POSTS
Hi,

If you have power under the dash, it comes from the fuse box under the hood. Your question related to the door module is relevant. I would recommend checking if it is getting power.

There should be two connectors at the module. I attached a pinout of them below along with the legend for each. If you don't have a signature series, let me know. It's different.

The larger of the two connectors is the one that receives power. Both pins 26 and 29 should have power at all times. Check if that is the case.

Additionally, take a look through the legend and let me know if there are other things that are listed being affected.

Take care,

Joe

See pics below.
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Friday, August 4th, 2023 AT 7:56 PM

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