Trim problems
 

I took the boat out for the first run of the year yesterday and it developed a trim issue. When pressing the port trim up button it will raise both drives, when pressing the port down it will lower the port only. When pressing the stbd up it will raise the stbd only, and when pressing the stbd down it pops the breaker after about a sec or to.

Everything worked fine last year, and I didnt do any wiring on the boat at all. So what could cause this?