Jog and circle are the only features that utilize the HD I believe. Needs to be powered ( as mentioned above) and free of magnetic influence. Does not need to see the sky.
I just read the manual. Can you not extend the power leads?
Test that the Power Cable that powers the Heading Sensor is long enough to reach the power source from the intended mounting
location. If the cable does not reach the battery or intended power source, select a location closer to the source.
I talked to Minnkota this morning and the girl I spoke to told me I didn’t need an in-line fuse. Didn’t think she was correct and she wasn’t.