Austin Simpson, It is usually due to a sticking switch in the door latch #1 on diagram. Take some WD40, spray the latch on the door all direction especially try to get around #1 on diagram soak it, open and close the door firmly/hard 10-20 times and spray it again. This will most likely clean/lube up contacts. Follow up with a better lube graphite/silicone spray lube after a couple days. Check the link below, may help.

If no luck you may have to change the defective switch. Good luck.

I hope this helped you out, if so let me know by pressing the helpful button. Check

http://www.f150online.com/forums/electri...