Well I have searched and searched
ABS light and CEL Light and odd speedometer means the speed sensor is bad well I call Auto zone and had them overnight me one swapped it out and the speedometer still acts weird. Whenever the Right Rear brake, or turn signal light illuminates the speedometer will jump about 10 mph back and forth once the light is no longer illuminated or illuminated for more than 2-3 seconds it levels out. the ABS light and CEL are also still comming on. Any one have any suggestions.

Thanks for the help

I guess you guessed at the code and never bothered to check it out to be sure....

I would have guessed (not a good thing, really) that the VSS is involved, but if other dash indicators are screwing things up, you have some digging around for opened wiring to do.

Anyway, (re)check the codes and you ight start thinking of popping off the cluster and checking the wiring. That wiring is thin and Ford doesn't have the funds to "overdo" things like that nowadays....

their is a big conector under the body of the truck .. so so in line with the driver seat . it is probly full of water . i see this a lot and 90 % of the time its the conector .