This is a complicated problem to diagnose. I followed the troubleshooting charts, which indicated a change in the ASCD control unit. Guess what? That didn't fix it. After a lot of time analyzing each input to the ASCD control unit, I found that the voltage to terminal 5 was lower than the battery voltage. This voltage is fed to terminal 5 through the ASCD cancel switch in front of the bake pedal. A resistance check showed a high resistance contact with resistance readings anywhere from 7 ohms to 20 ohms - very intermittent. I changed the cancel switch, and it works great!
Changing this switch is somewhat of a challenge because you have to remove or at least unbolt the brake pedal assembly to gain access to the button - really, not too bad once you realize that is what is required.
I suspect most owners with a flashing cruise light have a defective ASCD cancel switch.
Changing this switch is somewhat of a challenge because you have to remove or at least unbolt the brake pedal assembly to gain access to the button - really, not too bad once you realize that is what is required.
I suspect most owners with a flashing cruise light have a defective ASCD cancel switch.