Chrysler Repair: 2004 Concorde LXi cruise control, concorde lxi, internal switches

Question
Hello-- I have a problem with the cruise control in my 2004 Concorde LXi (3.5L). When the cruise control is turned on and the "set" button is pressed, the car accelerates rapidly, to the point of downshifting. The linkage from the servo does not seems to be jammed in any way and vacuum lines look OK\. The cruise control acts as if the "accel" button is being pressed down all the time. That button does not seem to be stuck, and pressing the "coast" button does not have any affect. Stepping on the brakes or pressing "cancel" will disengage the cruise control. Do you think this is likely a short to ground on the wiring for the accel button, or are there other things to check first? Can you tell me the pinouts to check if it is likely that the wiring is bad? I am fairly adept mechanically and electrically, but I didn't want to poke around blindly in my wiring hardness and airbags. Thanks very much for your time.

Answer
Hi Ken,
The latest manual I have is the '99 so I can't be sure this applies to your '04. However I note that there are only 2 wires that serve that control switch, and that there are 5 separate internal switches each attached to a different size resistor which is what causes the different functions controlled by the switches. Because you can activate the unit that would indicate that the wires to the power train controller (pins 41 and 43) are patent through the clockspring.
You could pull the plug at the controller and put an ohmmeter across those pins and then try to see if you get a measureable resistance reading when you turn it 'On', and then try the other 4 buttons to see if the resistance reading changes for each of them. If it does then probably there is nothing wrong with that circuit and switch and the problem lies with the servo/powertrain communication or function. If the resistances don't change properly, I would suspect that the internal switch contacts are dirty.
Roland
PS I just saw your question in the "pool" to which it was just referred. Sorry for the delay.