2012 F150 XLT Supercrew - Rear door ajar light stays on when door is closed. Any advice as to how to fix this myself versus bringing it in to the dealership?
The door switch has either failed or is crudded up, the best thing to do is remove the latch assembly and clean it with some good contact cleaner like Electromotive, then run and ohms check on the switch to see if it will work, if it still reads open then the unit will have to be replaced.
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