Fan and gauge issues

Had the car out for the first time Saturday and ran into 2 issues.

1. Temp gauge isn't working. When I turn the key on it pins the gauge all the way to the right, which would be over 260 degrees. It's an autometer electronic temp gauge.

2. My fans keep blowing the fuse. I have twin electric fans on 1 relay and one 30amp fuse. The relay is activated by a manual switch.

Any help would be great. Electrical isn't my thing.