Possibe blown fuse
fuse #17 in the fuse box located under the rear seat bench
could be numerous reasons, such a bad courtesy light switch on either of the 4 doors, a grounded courtesy switch wire, or possibly an entry module fault ( when you push in the lock button, and the interior lights come on ) . Good luck
you have to go from the inside removing the plastic cover from the inner pillar from there self explanatory
Under. Hood
There are several things that can cause your 2000 Cadillac dashboard lights to quit working. The most common cause is a blown fuse.
Where is the fuse box or fuse that disables the headlights and interior lights in a cadillac eldorado touring
the fuse box is located just below your steering wheel you have to take off that big black plastic cover to get to it but dont worry its only like 4 star screws
check your fuses
If the interior and parking lights are not working on a 1999 Nissan Pathfinder, the first fuses to check would be the interior light fuse. Also check to make sure the light switch is in the right position to allow the interior lights to come on.
on the left side of dash board there is a little buttom push it in it will pop out turn it to either brighten dim on turn on interior lights
Check switches on doors for proper operation. they are usually adjustable.
The most likely reason why the interior lights of a vehicle are not working is because a fuse has blown. That is especially true if all of them are not working. Get out your owners manual. See where the fuse box is located. Find the particular fuse, and replace it.