[XCSSA] Blowing Fuses and Unsure Why

[X-otic Computer Systems of San Antonio]

Hi again all!

So I have got my power board almost working! Actually, half of it does  
work - the 5VDC half. The 9VDC half...well, seems to work for a few  
seconds and then blows a fuse. I'm not sure why. I've got LEDs (with  
resistors) hooked up to each output and, for some reason, the 9VDC  
lights up for a few seconds and then my fuse blows. Everything looks  
connected properly but there is no load on either side except for the  
LEDs. I'm thinking it has something to do with grounding. I haven't  
connected the grounds on either side and I'm guessing that might be my  
problem? If so, does it matter where I connect the grounds together?

Unfortunately, I ran out of pico fuses. Whoops :) Guess I should use  
those in a final design since they are sort of a pain in the ass to  
replace, doh! Oh well. I'll order some more of those once I know  
what's going wrong.

Thanks, as always, for the help!

Tim