The intermittent blower may be the plug that's melted. The blower, as it ages, draws an increased amount of Amps. The plug them melts. There is a tsb for this. The harness cost me 19 at the dealership.
I'm not sure about the reverse bipolar behavior of the rest of the controllers. Did this start happening after you repaired the blend doors etc?
1994 Hunter Green ZJ 5.2L Quadratrac
228k Miles, 2" BB.
2002 Slate Grey Grand Cherokee Overland
161k Bone Stock
2008 Black JK Sahara Unlimited (Love it!)