When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
You may have better luck asking your question in the F150 group.
Could be that your lock motors are just getting tired. The sable my son is driving has 1 lock that acts like what your describing. Pain to get to, so I've never really tried to change it. I did spray it with some lithium grease and it help for a short while.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.