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Have you tried the dimmer switch? It is usually located next to the headlights switch. On pull out headlight switches, rotating the switch itself clockwise or counter clockwise is the dimmer switch and interior light switch.
Beside your headlight switch in the dash is your gauge panel dimmer switch ( Rotate the switch all the way up to turn on the interior lights )
On your light switch there is a dimmer for the dash lights . if you turn it all the way to the left your interior lights should come on , turn it to the left and see if that works otherwise it might be a door switch .
On many cars, there is a dimmer switch which controls the instrument panel lights. If this switch is turned all the way, it may cause the overhead light to come on. The overhead light will then stay on even after doors have all been closed. Find the dimmer switch, close the doors, wait 30 seconds, and then turn the dimmer switch.
I believe if you turn your gauge panel dimmer switch all the way it turns on the interior lights when all the doors are closed
Has the gauge panel dimmer switch , just to the right of your headlight switch , been turned all the way down ? That will keep your interior lights from coming on when you open the door
The panel dimmer control is to the right of the headlamp control. If you roll the panel dimmer control up past detente (the catch), it is in the full up position and all of the interior lights will remain on. If you roll the panel dimmer control down past detente, the interior lights will turn off (unless they are individually turned on in which case the panel dimmer switch is overridden). I would also suggest the question could be related to interior lights that keep coming on due to a stuck door ajar switch. See "Related Questions" below for more about that.
To the right of your headlight switch is a dimmer switch for your gauge cluster lighting - I'm not sure if it's the same on your F150 as my Explorer but when my dimmer switch is rotated all the way up it turns on my interior lights . Also if you have a door ajar light lit up in your gauge cluster , you probably have a sticking door ajar switch
I believe if you rotate the gauge panel dimmer wheel switch ( beside your headlight switch ) all the way down , it will keep your interior lights from coming on when you open a door
Just to the right of your headlight switch is a dimmer wheel for your gauge lighting If the dimmer wheel has been rotated all the way up , your interior courtesy lights will stay on ( even with your doors closed ) If your interior lights are on with a door ajar indicator light on in your gauge cluster , either a door ,your liftgate , or your liftgate glass is not closed or you have a sticking door ajar switch (Helpfull)
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Have you checked your gauge panel dimmer switch ( just to the right of your headlight switch in your dash ) If that has been rotated all the way in one direction that will keep all your interior lights on with all the doors closed