Given the wiring is pretty sharp, i'm guessing a new servo. But glad to hear i'm not the only one. It's a cheaper part to throw at it, and better to shotgun with a choke.

 

Test the wiring before you throw parts at it

 

Cruise servo lives right underneath the battery. Not an environment conducive to a long life. They tend to have rather nasty stuff drip onto them, which eats them up.... and they stop working. Being under the battery tray though, makes it REAL interesting to inspect. Getting the battery tray out is no picnic either.......