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Re: Follow up to
I work for an automotive company that suppllies these types of motors. The Aurora is a Delphi system so I do not know the specifics...
Generally these motors (called actuators in the trade) have 5 wires going to them (M+, M-, +5, feedback, gnd). The M+ and M- pins cause the motor to move clockwise / counterclockwise (depending on the polarity of the H-bridge driving them. The +5v, feedback, and gnd set up a pot that provides feedback the HVAC head for the doors position.)
Some of the Dephi actuators skip the M+ abd M- pins for one line that is a tristate control signal (0, 2.5, 5 volts).
The easiest thing to do is to find the pin that is the feedback line and measure if the motor feedback changes when the user keypad requests cold/hot. If it doesn't, see if the M+/M- lines change state.
Getting someone to replace the small motor inside will be difficult as there are custom tooled worm gears attaching it to the internal gears. You're better off replacing the whole actuator.
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