Let me just start off by saying that the cruise enable needs to be a toggle switch. All of the other switches are momentary. The cruise control and driver information circuits use voltage dividers. That's why there are so many resistors. With that said, there isn't really a one-to-one switch to resistor relationship. What I mean is that the first switch doesn't only connect to the 5360 ohm resistor, the second switch doesn't only connect to the 1270 ohm resistor and the third switch only to the 1620 ohm resistor.
When you turn the cruise enable switch to on, the current flows through all three resistors. The BCM detects the voltage drop across the sum of the three resistors, 8250 ohms, and that's how it knows that you turned on cruise control. When you press the set/- button, the current flows through the 1270 ohm resistor, and that creates another voltage drop that the BCM detects. Same fro the res/+. Current flows through both the 1620 and 1270 ohm resistors providing a another resistance value that the BCM picks up on. This is how you're able to get three different signals all using the same wire.
The same theory works for Driver Information Center info/return buttons.
