2003 Excursion, 6.0 diesel

replaced disengagement switch on master cylinder (was bad)
replaced cruise control switch on steering wheel (had broken button)

cruise will not turn on, and will not enter self-test mode

all fuses good. Illumination to steering wheel buttons is working. cruise buttons are registering with a scan tool, but still cruise will not turn on or enter self test mode

Cruise went down about the same time I started using the power adjustable pedals, not sure if that is relevant.

thanks for any help

 

Are you getting a flashing air bag light ?
I recently got a 99 f150, cruise does not work , horn no work , flashing a 32 code air bag light.
Diagnosis is a bad clock spring .
Good luck and let us know what you find .