First i assume this is in the right thread since i think its electrical but my cab light ill put the light bulbs in they'll be on no matter what i close the door they are on ill open the doors they are on so i have to remove the light bulbs or jiggle the switch till it goes off and hope no one bumps the truck any ideas on how to fix this? a New light assembly? a wiring problem?

 

Does the "Door Ajar" light come on with the dome light when this problem happens? If so, that would mean the door switch is either broken, or more likely stuck.

 

There is no door ajar light

 

Look over on the dome light and see if there's any switches. If that goes nowhere...

Look on the dash. left side, near the turn signal stalk. There's a roller switch for dash light dimming. If it is rolled all the way up, interior lights will be on. Roll it down about half way for good measure and see if the issues goes away.