NO, vibration would not be the cause.
The cause for fuses to "blow" is the flow of electrical current in excess of the capability of the wire to carry.
Fuses are designed, manufactured, and installed to protect the wire from over-current conditions which could cause the wire to melt its insulation an cause a fire.
Some ignorant people will suggest installing a larger fuse, but that will not solve the problem, AND...
Can cause serious damage to any electrical equipment on the circuit, and..
In a "worst case" situation, cause a fire which can destroythe entire electrical system, and possibly your vehicle.
It will draw over 18 amps and will blow a 15 amp fuse.
Probably a short to ground.
Need to know which 20 Amp fuse is blowing.
Yes, as long as it doesn't blow. You can always go lower with a fuse, but not higher.
The starter is failing.
You cannot because a five amp fuse would blow because the original fuse was seven point five. and a ten amp fuse would not blow quick enough to save or even be safe to use it in whatever you are using it for.
If you do that the likelihood is that you will blow the 3A fuse quickly. There is a reason why the current fuse is what it is, because it is expecting currents around 80% of 13 A or around 10 A.
A fuse is a safety device which is designed to blow (fuse) if a larger current than it is rated for passes through it. So a 10 amp fuse can pass anything up to 10 amps.
The 13 amp fuse with blow at the lower rate to the 15 amp fuse. And At 15 amp the motor is normally more powerful - check the wattage used in both
Check fuse #34 in the passenger compartment fuse panel. It is a 20 amp fuse. It is YELLOW.
not smart to do it cant carry the load of the circuit it will blow. in emergency maybe but never go with a higher rating
Only if you want to blow up the microwave. That will let 20 amps go through before the fuse blows when the manufacture is telling you 18 amps max. <<>> Yes, you can use the 20 amp fuse. At 250 volts 2 amps is no problem and you are not going to blow up the microwave. On a fault current the 20 amp fuse will trip just as fast as an 18 amp fuse.