Well if the amp works with the car off and when you start it the fuse blows then you may have alternator issues use a volt meter to check battery voltage is not above 14.5 volts
if the fuse blows when the amp turns on then most likely you have a shorted output section in the amp.
If the speaker wires touched you have blown output devices. That's why the power supply is blowing your fuse. The amp will need repairs.
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Before the amp started blowing fuses the wires kept coming out of the speaker box while I was driving.
Did you install an second install product since you have the vehicle? Most of the time, you will have to ensure that car has a 12 ignition on the key, cause sometimes some of the reaction of the car may be due to an install trouble between the 12 dc and the 12 ignition. Some car manufacturers did not install a 12v ignition, then the reaction of the electronics applications can be the reason why. If you make any changes, inform cause that can be one of the explanation.
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