Originally Posted by Topdog2007
Same method worked for me also!
Just thinking out loud and I am not
an Electrical Automotive Tech or anything that might resemble one like some of the guys on here; my ideas are shooting from the hip and may need some refining based on different systems so take what I suggest with a grain of salt.
Even after you do the "spraying of the latch" thing, it may not help, the switch inside the door may be bad and need replacing but since it worked before it should now.
If after spraying, the light is still on, attempt to check out the power through the switch, remembering that the system is ground dependent. This means that there should be power in the door latch area but you may still have a bad latch switch; usually the latch fails on that is why you get the light on situation.
The power needs to flow through the switch to ground when the door is open or ajar so remember, once the leads are connected to check the working of the switch close the door and see if the power still flows through the switch. If if does then the switch is probable bad and needs replacing.
Connect the leads of the Multimeter or test probe from the ground side of the switch.
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