Lazer Z CT blowing fuses (both-one at a time)

While cutting one day the motor stopped. Checked fuses and one was blown (not sure which one now). Put in a new fuse and blew as soon as key turned to run. This continued to happen so we started to review all wiring for a short (nothing found). Have replaced switches along the way including the ignition switch and pto switch. Still have not found the problem. Tried turning key to start position and did not blow fuse until key went back to run position (starter did not move as well). Both fuses will blow (one at a time, whichever one is the weakest.) Any suggestions as to what to replace/check next?

LCT 52 19KA 472...

Lazer Z CT blowing fuses (both-one at a time)