Interior lights do not turn off

1997 FORD F-150
1,000,000 MILES
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JUSTIN1776
  • MEMBER
  • 1 POST
Interior light remains on even when all doors are properly shut and all lights turned off.
Dec 22, 2020 at 10:19 AM
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JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

Chances are one of the interior lamp switches in the doors has failed or the interior courtesy light relay is bad. As far as the fuse, if you look at pic 1, I highlighted the fuse. Also, I highlighted the relays as well.

Pic 2 shows the fuse location as well as the relay locations. If you want, check the relays.

Here is a link that explains how to test a relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

One more thought that may be the easiest thing to check. Make sure the door ajar switch isn't stuck. Pic 2 shows the location. See if it moves in and out easily. Also, if it is stuck, you will need to spray it with a lubricant and try to work it so it loosens.

Let me know what you find or if you have other questions.

Joe

Dec 22, 2020 at 12:02 PM
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