f150April 23, 2010April 25, 2010have a 99 f150 and starter wont disengage when truck already on. changed selenoid and starter . Keywords:Starter 2 thoughts on “f150” Freeautomechanic April 25, 2010 at 1:25 pm Sounds like your Starter Relay is sticking. Replacing it should fix the problem. http://www.freeautomechanic.com/starting.html Anonymous November 26, 2012 at 9:53 pm In F150 1999 truck what does the #1 power point fuse do? Comments are closed.