My manual shows the V32 circuit drawn two different ways on two adjacent pages. It doesn't show the green light, but the voltage has to be coming from the PCM and going to the brake light switch, then to the servo. To double check me, press the brake pedal to open the switch, then there should be voltage on the yellow / red wire. If you find 0 volts, and voltage on the dark blue / red wire, I'm looking at it backwards.
Also, if I'm wrong, there will be no voltage on either wire if the servo is unplugged.
You're right about the yellow / red wire to the switches. I was looking at it as supplying voltages to the PCM, but in fact, the 5.0 comes out of pin 32 of the PCM and is grounded by the switches. Can you monitor the voltage on that wire from under the dash? Does the cruise kick in while the green light is on?
I'm wondering if there's an intermitent break in the clockspring or two circuits are touching at the ends of its ribbon cable. It almost sounds like the PCM is detecting a problem and is shutting the system down in response. That could be due to the detected problem could lead to it going to wide-open-throttle, or the problem could prevent it from getting the cancel signal from the control switch or brake light switch.
Sunday, March 14th, 2010 AT 7:43 PM