Jak2

Hi, My micra k11 2002 micra was blowing the main 30A ignition fuse at the battery area when the ignition key was turned to the start position. The fault was traced to a short circuit in the black/red cable from the ignition switch to the starter solenoid. This circuit was rewired and is ok now but I would like to know where the actual short could be in the ignition/engine harness without stripping the whole dash out. Can anyone help or is this a common fault with K11's. Thanks