Take the bulb out!
SOURCE: 2006 Dodge ram 2500 diesel Quad, door locks
Try checking under hood in power distribution box for blown fuses also, or bad connection to it.
SOURCE: 2009 Jeep Grand Cherokee Laredo interior lights won't turn on
check your light dimmer & see if you have it set all the way down.If it's anything like my 99WJ it has an off setting when the dimmer is set all the down causing the interior lights to not come on when you open the doors,hope this helps
SOURCE: interior dome lights wont activate wh en doors
If none of the interior door lights work, check the fuse, and check the bulb. If they are both ok, then you may have a bad relay or switch but you will have to trace the wiring which is a pain.
SOURCE: 1999 Chev Silverado Door Light Switch
the actuator for the dome light is actually located inside the lock mechanism. Have you checked to make sure the dome light override button is in the out position?
i would hazard a guess and say that wires in the rubber boot from the door pilar to the door are damaged or the connection block in the door pillar in this the terminals are corroded or something similar
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The liftgate lamps
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Courtesy/map lights
The courtesy lamp supply voltage circuit of the body control module (BCM) supplies battery positive voltage to the dome lamp, the liftgate lamps, and the map lamps. When any door is opened, the door jamb switch contacts close providing a door open input to the BCM. The BCM then provides a ground to the interior lamps with the switch in the AUTO position. The interior lamps receive a ground at G401 with the switch in the ON position.
Important: If the liftgate is opened after all the modules go to sleep, the dome light will not come on. The liftgate ajar switch input to the BCM will not wake up the BCM once it has gone to sleep, so the dome light will not come on. Once the BCM gets an input to wake it up, from remote keyless entry (RKE) or a door handle, the dome light will turn on when the liftgate is opened.
If the driver inadvertently leaves any interior lamp ON, the BCM will turn it OFF after a 20 minute time-out.
The courtesy lamps will turn OFF immediately if the ignition switch is turned to the ON position or approximately 20 seconds after all doors are closed.
The courtesy lamps are controlled by the body control module (BCM). Inputs from the dome lamp switch and the door ajar switches are monitored by the BCM. When a door ajar switch is closed, or the dome lamp switch is turned to the ON position, the BCM supplies the B+ for the courtesy lamps.
With out a factory Tech2 scan tool or equivalent an knowing how these systems work ,you best bet is to take your vehicle to the dealer or some other ASE certified repair shop !
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