Question about 2002 Ford F250 Super Duty SuperCab
If spraying WD40 into the latch didn't fix it then it has to be a bad switch or wiring to the switch.
You will have to pull door panel/s to access them and check them from here.I would probably start at drivers door since it usually has the most use.
Pull panel and look at the latch and you will see a 2 wire connector to it drivers side wire will be LG/YE and BK,passenger door is PK/LB and BK and if it is a crew cab rear doors are in series right side is GY/OG and BK/WH which this wire feeds the switch in left rear and other wire on drivers side is BK.
Disconnect the connector and see if light goes out. That will be the bad one. then you have to remove the latch to replace the switch.
Posted on Mar 11, 2009
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