Red Lex

I have a 1995 Lexus SC400 coupe with only 80,000 original miles. Each time I put a fuse in the under the hood fuse box, the fuse blows. I've gone through 20-30 fuses at this time. My shop disconnected everything on the line (Amp, speakers and radio) and found that fuses are still blowing. Based on my shop, they have confirmed that the wiring issue is contained in the front of the vehicle and not the back. Any ideas on what is blowing the fuses?