I have a 2005 F250 6.0 that the cruise control has not worked since I've had it.

Things I've checked:
Turn/brake bulbs are all working
Steering wheel buttons ohm out at the connector at the base of the steering column
Lamp lights with instrument cluster test
Bypassed master cylinder switch with paperclip
No fuses seem to be blown

I've tried to do the key on holding down the off button test, but the CC light never comes on.

Any other ideas?

 

Update:

When I press the cruise on and coast buttons, the horn blows. Is this supposed to happen or is it a potential clock spring issue?

 

Nope. Horn should not blow when cruise control button is pressed.

Not sure if this happens on SD, but you may want to check at throttle body to see if CC actuator cable is functioning correctly, lube, cracked, just bad.

Good luck, let us know what you find.

 

Did you check to see if that feature is enabled in the PCM?
That test was for older systems. It is not present in your truck.
On earlier vehicles, this was an "easter egg". Don't know if it was present on this era of the Super Duty, perhaps another owner can check.
There is no cable or actuator, this is a 100% electrically controlled throttle body. The PCM simply controls the throttle instead of relying solely on the input from the accelerator pedal sensor.

 

I don't know how to check to see if CC is enabled on the PCM, but it is an FX4 Lariat so it should have come standard with CC.

I was wondering about the CC system check, I saw some things saying certain year models, others not.

Right now I am leaning towards the clock spring since the horn blows when ON and COAST are pressed together. Also, while some of the CC buttons ohm out correctly at the connector, the ON and OFF aren't close to what the wiring diagram says they are supposed to be.

Still open to any other ideas, clock springs aren't cheap for sure. Also, does anyone know if the clock spring with radio controls will work in place of the CC buttons only one? Reason I ask is it looks to be $50 cheaper and I've toyed with the idea of getting a steering wheel with controls and adding them if the wiring is present in the column.

 

Doesn't mean that the current PCM (or its programming) is original.

That is not what you implied in your original post.

 

My wife was hit in the passenger side fender at a substantial rate, I have a 1999 f 250 V10, since the accident the Cruise Control and the Horn does not work... I checked all the fuses, replaced switch at master cylinder, and self diagnostic (no light or reply).. Checked parking break was released.... No Cruise Control light ever comes on in the dash....when I press the horn I can here a click but no horn....Noticed the thread,.Any Advice?