Well my 2008 V-10 finally has a problem after 124k, the cruise control isn't working. Well, sometimes it does work but not for long. I stopped by my Ford dealer and they said they couldn't take me for 5 days, too many 6 leakers ahead of me in the shop. They said it could be one of six different reasons but they didn't elaborate. I have a local mechanic that can look at it but if anyone has some suggestions, please let me know. Thanks.

 

Is your horn working?

 

Check the wiring in the steering column.

three bolts on the bottom of the cover and then the top snaps off.

 

Yes, the horn works. I also tried it in regular and tow/haul with no difference. It actually worked yesterday for a few miles and am still baffled.

 

Brake pressure switch on the master cylinder...at the front of the master cylinder one.

Check it out.

 

I have the same truck, and i found a diag test from this website started in '10. you hold the cc off button down and turn the key to the on position and it should flash and then start the test. I tried to do the test but the cc indicator light never flashed, so i am thinking that my buttons are faulty if i cant do the test. I want to know how to take them out to replace them.

 

found the test here it is.

*cruise control self test*

Enter self-test diagnostics by depressing the speed control OFF switch while turning the ignition key ON, making sure the engine does not start and is not running. The speed control indicator on the instrument panel
will flash once to indicate that speed control module entered the diagnostic mode. Five additional flashes at this point indicate a defective speed control servo. Release the OFF switch.
Press the remaining switches in this sequence: ON, RESUME, COAST and SET/ACCEL.
If the ON switch is not depressed within five seconds after entering the diagnostics mode, the module times out and the procedure must be started over.
The speed control indicator lamp will flash as each switch is depressed. Press each switch in the sequence immediately after the indicator light goes out for the previous switch.
NOTE: There will be a slight delay when the last button is pressed and the lamp flashes.

A lamp flash with the last button (SET/ACCEL) indicates that the static test passed. If the lamp does not flash with the last button and there are no additional flashes of the lamp, the switch is defective.
If the lamp does not flash with the last button, and additional flashes occur, follow the chart below for trouble codes:

2 flashes - BPP defective, circuit is defective, brake applied, CPP switch or jumper (if equipped).

3 flashes - deactivator switch is open or circuit defective.

4 flashes - vehicle speed signal is out of range or circuit is defective

Immediately (.25 second delay) after the static test, the speed control servo does a dynamic test by automatically actuating the throttle lever from 8 mm (0.315 in) to 12 mm (0.472 in) of travel from the idle position. During the dynamic throttle pull, observe throttle movement to witness any binding or sticking of the speed control cable and correct connection of speed control cable to throttle lever. Make sure the throttle returns to the idle position.

 

All I can say is WOW, AKGriffin you are a rock star for finding this test. I am printing it now and will have it ready for my son-in-law and I to test it out later today. Thanks again for your effort.

Pap

 

Great test...but if all else fails replace the brake pressure switch.

 

ty pappy...i didnt do anything but pass something along. I had actually just read about that test a hour before. Now if i can just get my cc fixed.