Alan,
To figure out what is wrong, you must have the wiring diagram for your specific
airplane. There is a basic wiring diagram in the build manual that may be a
good starting point for you. Once you have the diagram, troubleshooting is not
difficult.
It sounds like your Rotax dynamo and regulator/rectifier are working correctly.
As others have said, the Rotax system does not put out much voltage at 2000
rpm. Our 914 puts out about 13.4 volts at 5000 rpm.
Get the diagram figured out and then see what is loading down the system.
Jim & Heather
N241BW
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