Stern drive rising up on its own

[Broaders]

I have a Volvo Penta SX stern drive, have noticed over time that the drive does not react as it should at times, two days ago I tested the stern drive by moving it up and down, found that at times on the control handle I had to wiggle the trim switch ( button) a few times to get the drive to lower, don't know if it's the trim button or something else
Today as I was walking by my boat I heard a pump cut in, ( Boat is on land) I ran to check the engine compartment and noticed that the motor for the stern drive was cut in and hot, so I'm thinking it being ongoing for a little while, and right now the stern drive is in the up position, I left it in the down position two days ago. Just woundering what could cause this, and how to fix it?
1) Maybe a relay ?
2) Maybe a short in the control handle and trim switch ?
3)

 

[Andy1962us]

I'm thinking its a short in the switch or wires leading to pump. The back and forth motion of the shift lever can cause wear in the wires and cause a short. Usually when a relay goes bad the pump won't work at all. I hope this helps.

 

[Scott Danforth]

Replace the thumb switch, then go boating

 

[Broaders]

I'm thinking its a short in the switch or wires leading to pump. The back and forth motion of the shift lever can cause wear in the wires and cause a short. Usually when a relay goes bad the pump won't work at all. I hope this helps.

Thanks a bunch, when weather permits I will try and pull the switch apart,
Cheers
Don B

 

[Broaders]

Up date on my troubles, I went through the wiring and found this on the harness going to the motor. I could not find the exact fitting, so I wired it with bullet type connectors. Tried the motor, and could here the motor clicking at first, after trying a few times ( stern drive did not move) now I can't even here the clicking of the motor, I change the 10 Amp fuse and no change,
Anyone with any ides as to what it could be
Thanks in advance

 

[Wave34]

Check the breaker behind the engine near the distributor. It has a red button.

 

[Broaders]

Thanks, that was it. So much infomation on this site,
Cheers