Garmin autopilot

[kpinnn]

I installed a Garmin autopilot. MFD, and radar all Garmin and all worked well for two years. Now I get an error regarding autopilot lost gps speed. Boat will not follow course wanders. I believe this is because of speed loss.. I do see gps speed on mfd . My bet it has an internal antenna and not good enough for autopilot. I installed another external antenna. For ais and autopilot but don’t were connect to autopilot. I am stumped. A lot makes no since. Also changed iPad and did updates. Any thoughts?
Ken

 

[AdmiralS]

The Garmin course computer and autopilot do not have their own gps. They have a magnetic compass inside the course computer but that is only for heading data.

The newer Garmin updates allow you to leverage GPS COG over magnetic and makes a tremendous difference on heading line and autopilot

That said, I would start by updating all of the Garmin software either via the Active Captain app or creating an update SD card.
https://www.garmin.com/en-US/support/software/marine/

After you update the software, go into setting on the MFD and make sure you have the right sensors selected as your primary source

 

[kpinnn]

Thanks for the help. I did solve the issue. It was me. When i mounted the mfd back into the boat after winter storage, I plugged the nema 2000 cable into the wrong port. Both ports use a 5 pin connector. Correct connection and updated software, autopilot works perfectly. Now, on to the genset. Good thing I enjoy problems. Lol
Ken