76 XJ6 Heater/AC Work

[rmmagow]

76 XJ6 US
I'm trying to fix my AC and Heater and need some pointers on where
to begin. Sitting in the car with the ignition turned on but engine
off the fan only runs in the DEF position. Moving the temp set from
hi to low does not produce any sound of servos or flaps moving. I
think the AMP is on the passenger side section of the console. I am
planning to take the panel off and put 12V right to the servo. It
was explained to me to unplug the AMP connection and get ground and
12V to the business side of the connector to see if that moved the
servos indicating an AMP problem. Does this AMP have anything to do
with running the circulation fans too? I don't want to get myself
in deep doo with the wiring inside the console. Are there other
areas I should be checking. Is the defrost fan seperate from the
regular cabin fans? Are there fuses to check? Where might they be?
I've got a parts and service CD but it's not real clear about
troubleshooting in this area. Any and all advice greatly
appreciated.