Question about 2002 Ford F150 Regular Cab
This is usually caused by the door ajar switch not making contact.
The door switch is part of the door latch on the F-150.
Liberally spray the door latch with WD-40, close and open a few times. Repeat this process 3 or 4 times, and check the interior lights / door ajar indicator on the cluster.
There are pictures of where to spray in a sticky in the Electrical forum on F150online.com if you need them. This is a somewhat common problem, to get dirt and gunk in the door ajar switch, causing the contacts to stay open.
Posted on Nov 12, 2010
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Posted on Jan 02, 2017
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