Hi its me again, im having some fun with this car

For some weird reason the 30A fuse under the bonnet just keeps blowing. I have probably done something stupid but i thought id ask. The fuse box cover says its a CDS fan fuse but the car will not start and the engine gets no power. I cant personally see an air con fuse (which my car doesnt have anyway) preventing my car from starting.

I have checked the elecrtics i have fettled even to the point of removing the rad fan wiring i have recently installed but the car just eats 30A fuses for fun.

Currently head scratching. Any suggestions welcome.

Cheers lads.