[CA] [CA11] Smart Pilot melted 2A fuse, blown board

[rickgard]

I found the break in a yellow ST wire! likely ground out the first time I powered the boat up.

Dear Chuck,
I have tested the following throughout the system to the boat ground:
Boat is 13.45V
Red SeaTalk = 12.65v
yellow pulses = 9.3v - 10.25 - 12.6v
shield is 0

I also checked continuity of the yellow from the termination at the course computer to and through the ST8002 head and to both e80 MFDs. also the red and shield.

without breaking into the ST8002 head I can't see that it is damaged. I can get continuity from its yellow/red/gnd tabs - so it is not burned to [censored] like the course computer. would this be an indication that the control head is still good?

I ask because I fear connecting my new(used) course computer even though all the voltages seem to behave as expected in the various points of the SeaTalk bus.

thank you very much for your help so far. It was great to find the break in the yellow!