Ok chasing down this electrical gremlin with the problem where one key would fire both port and starboard fuel pumps etc but not start both engines. These relays are under the dash. Not sure what they're for but the pink wires jump between the relays and thus when i turn one key it fires both "on" positions of ignition, so fuel pump etc.

I replaced them, it's just a standard 20A relay, they have been there as long as I have had the boat, not sure what they do. New relays and same problem, so time being I have just disconnected the wire that ties relay 1 and 2 together.

Ideas??

Trying to figure out how to post a pic