i have a 99 xlt f250 superduty with the 7.3 extended cab. the dome light staying on and the bed light. i tryed wd-40 in the door latch. nothing i dont have the door ajar light on in the dash but when i get in and close the door and put the keys in it dings like the door is open and the bed light and dome light stay on till i start to drive and get up to 15mph then they go off but when i come back to a stop they come back on i can here the relay kick on and off in the dash and everything else seems to be working fine. i dont know if it could be the switch in the door or the (gem) i also checked the fuses and the drimmer switch they seem to be fine any ideas???