The 30 amp fuse keeps blowing

Check the data. If it should have a 20 amp fuse and it blows or trips a circuit breaker you probably have a faulty element. Try disconnecting each element in turn,

you may have a short (verify the integrity of the insulation of the positive wire from that fuse going to the rear window defroster, check the relay & switch.) try to replace the relay.

when at startup or driving

Have your voltage regulator checked a bad regulator will blow big fuses like a 30amp, hope this helps.

Sounds like somthing is grounded, along the way.. The easy to find it is using an inductive amp meter, and a 30 or 35 amp, self resetting, circuit breaker for diagnistics.

replace the fuse with the circuit breaker, and get it to start tripping, like pressing the brake pedal. Once it strarts cycling, follow along the wiring with the amp meter.... It will bounce wildly along the good portions of the wiring, and then give no indication AFTER or downstream of the grounded area....

30 amps is heavy, so bypass nothing. Look for a short in a heavy circuit like the the headligh, starter (questionable because of delay) same with starter relay. You have a wire shorting out on the frame somewhere. It's that cut and dry.. Go to the auto parts store and buy an automatic circuit breaker that matches the fuse type your bike uses. but instead of a 30 amp, get a 20 or 25 amp. As long as theres a short it will trip and reset by itself saving you the hassle of changing fuse every few minutes.. While the breaker cycles on and off you can search for the short. When you find it, the breaker will stop cycling and stop in the on or reset. Good Luck

It looks like the wire circuit for the wiper motor is touching the car body when shaken so the only thing you can do is shake the wires and terminals yourself while engine is running then maybe you can pinpoint where the earthing is.

try lifting the stove top assy and checking wires under main top, leading to the elements them selves??? if tis tripping and not allowing to reset its gotta be an obvious short. isit hard wired directly to stove or into a 220 cord and plug???id look again, perhaps remove entire back panel and have someone trip on the breaker you might see where it flashes as it trips off