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I'm not sure if they are the same or not, but I had the same problem with a 2000 Ford Ranger. The fix given on another web site for the Ranger is to spray the door latch (in the hole on the edge of the open door that mates with the latch device on the door jamb) with WD40. If the Expedition system is like the Ranger, the light switch is in door latch & WD40 will fix it for a few months, at least. Hope this works.

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Q: Why would the exterior and interior lights stay on in a 1999 Ford Expedition?

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An antonym to exterior would be interior.

Interior

Interior

probably the heat on the drive ways or some cord in the car is just messed up.

The exterior angle of a triangle is equal to the sum of the two opposite interior angles. So if a triangle had points A, B and C: The exterior angle at B would equal the sum of interior angles at A and C. Similarly, the exterior angle at C would equal the sum of interior angles at A and B And the the exterior angle at A would equal the sum of interior angles at C and B.

You would need to know the interior angle because 180-interior angle = exterior angle

Hi, A friend had the same ploblem with his 2001 Lincoln Continental. The lights on the keypad and interior lights would randomly turn on. The problem was a defective keypad water was shorting the switch.

yes i used to use neon interior and exterior lights and i wish i would of found the led kits before because they are about 6 times brighter. You can see it clear on a sunny day.

Using exterior paint on the interior should not be a problem. You would only use exterior paint outside because it weathers better, which is not really an issue here.

Just a guess , has your guage lighting dimmer wheel switch been rotated all the way down ( or to one side ) ? I believe that will turn off all the interior lights It is located to the right of your headlight switch

Interior paint could be used on the exterior with a much shorter lifespan. To extend the lifespan a topcoat to seal it would be advisable. Instead of this two step process, an exterior paint is advisable.

No. An interior angle plus its exterior partner add up to 180 degrees. In order for an exterior angle to be acute, its interior partner would have to be obtuse, which doesn't happen in an acute triangle.

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