Interior lights only come on with the passenger front door. on 1996 Ford F-350

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I put power the one of the wires on the chime and the interior light come on for the driver's front door. What would cause the interior lights to be power only at the passenger front door and not the others?
(1) Answer
You may have faulty door ajar switch(es). Lubricate the latches (where the switches are located) and see if after repeated open and closing attempts the lights start coming on. The switch could be defective too, and lube may not work.