Default 2014 200XCA outboard, no power to Main relay

[briandownunda]

I have a 2014 Sea Hunt Gamefish with twin Yamaha 200s with electronic shift and throttle. Recently, I went to start it up and found that the port engine was non-responsive, while the starboard engine was fine. It would not start, tilt, or do anything. I also noticed that the little blue led at the helm shift controls was out for that engine. I tried swapping the fuse boxes, and verified that the port fuse.relay box is good by running my starboard engine with it. I then got out my Yamaha service manual, and started reading section 5, electrical system. Using a multimeter I discovered that the main relay is not energizing on the port engine, for some reason. Page 5-19 step 3 of the manual requires checking the main input relay voltage with the start switch in the off position. That test passed. Steo 4, with the start switch on, failed, which, I assume means that there is no ground to complete the circuit for energizing the relay. I then went to the "checking the ECM circuit section", and step 4, start switch on, terminal 53 to ground failed. (this test passed incidentally with the starboard engine).

Since the ECM is completely out of the equation for that test, there must be something wrong, somewhere else.

Also, when I bypassed the main relay by putting a jumper in to connect the circuit, the little blue LED at the helm for the port engine came on, and the engine started, and everything behaved as normal.

Perhaps the key is in where does the power come from to pin 53 of the ECM? Since I don't see 12 volts there, there must be a circuit somewhere that drives that connection.

Any suggestions on where I should look from here would be most appreciated.

Thanks in advance!

Brian