Thanks for the wiring color info. However, the wire colors on my 2005 Malibu are different colors. I measured the voltage to ground of each color while the engine
was running and the fan "ON". For each color I depressed and released each of the four switches and recorded the voltage. The readings are as follows. White- 12, 12, 12, 12. Black/ White- 0,0,0,0. Green - 0,0,0,0. Orange- 12, 12, 12, 12, 12. Gray- 0,0,0,0. Dark Brown- 0,0,0,0.
Brown- 12,12,12,12. Blue - 2.5, 2.5, 2.5, 2.5. As you can see the voltages did not change when the switches were pushed and released. Is this information enough to know if the A/C Control Panel is faulty?