check you brake light switch ......
And your cruise control switch

 

If it was the brake light switch the engine light wouldn’t be on. The 5077 code is specific to the cruise control.

 

Do you mean P0577? any mods to the bike?

 

Yes my bad p0577 too high cruise control input. Only stage one but that was done years ago

 

Anything odd with your speedo or odometer? I don't know if input "too high) has to do with pulse rate but if it were mine I would start looking at vehicle speed sensor and its connectors. There used to be a lot of flaky speedos, non cancelling turn signals, and cruise problems that traced back to metal contamination on VSS. Some people cleaned and reinstalled them and all was good, and others just replaced them. At least a place to check. Has the bike had a bath using a high pressure washer or a garden hose? Water can get into connectors and cause all kinds of weirdness.

 

Speedo and tach are working fine. I’ve put a good 10000km on the bike since the cruise crapped out. It happened when I was riding about 15km a day on a rough gravel road for a few weeks. I’ve taken the switch apart and cleaned everything really good but it didn’t help. I know there is a road map to diagnose the issue but you pretty much need to be a Harley tech to access the appendix’s for the shop manual

 

From 2011 Elec Diag Manual for DTC P0577

 

That’s exactly what I was looking for I’ll probly start on it in the next week or so