Here are the results of the tests: F-2722 right channel driver All connections to F-2721 disabled. With Molex connected, ranges from about 250-280 mv but will not settle. With Molex not connected, increases from 0 to 400 mv and then recycles. F-2721 left channel driver With Molex connected, 0 to 400 mv and then recycles. With Molex not connected, 0 to 400 mv and then recycles. Throughout all tests, the unit relay clicked and the protection light stopped blinking and went to a steady on status. Thoughts?