Started to troubleshoot an issue with my roofrack lights. There are 2 separate circuits and both were impacted so immediately suspected a bad earth.
The three 6AWG (2 separate +ve feeds and 1 -ve feed) are part of a harness I made that routes up through the snorkel to get to the roof.
This is what I found when I opened the harness.
View attachment 2252991
I can't remember ever seeing this level of corrosion. The 3 cables at this area had a cable shield and marine heat shrink with no external evidence of damage.
It's been up there less than a year. Not sure what would cause this level of electrical corrosion.