Short in A/C system

Hello,

Has anyone had a short in their a/c sytem?

2010 Tundra 5.7. A/C was working fine last year, not working at all this year.
Replaced the clutch, checked the freon with gages, replaced the relay.

It had the dreaded a/c flashing light on dash.

I can apply power to the #3 on the relay and the clutch will pull in and it will start to get cold in truck.

But when I put relay back in and turn on a/c the 10 amp fuse under the dash blows.

I'm at a loss. Jumping out the relay should tell me the compressor is good. The pressure switch has continuity with engine off.

Any advise will help before it goes to a shop.

Thanks

Bob