Hi,

I finally put the AC Control Unit back in the dash. I have tested the 3 pin wires using a Multimeter.

(1) Test the middle pin with AC switch disconnected--->0 Volts & plugging the 3 pin wire to the Blower turn ON full blast
(2) Test the middle pin with AC Switch connected ----->12 Volts & plugging the 3 pin wire to the Blower turn ON full blast
(3) Test the middle pin with AC switch connected (a) Switch 1---> 11 Volts (b) Switch 2--->10 Volts (c) Switch 3--->9 Volts (d) Switch 4--->8 Volts (e) Switch 5--->5.5 Volts
(4) With Engine On, test the middle pin with AC switch connected (a) Switch 1---> 12.5 Volts (b) Switch 2--->12 Volts (c) Switch 3--->11 Volts (d) Switch 4--->10 Volts (e) Switch 5--->7 Volts

Whats odd is that the Blower keep blasting away with or without the AC Switch connected or disconnected.

But the Multimeter detected 12 Volts in the middle pin when the AC Swicth is connected but 0 Volts when discoonected?