A radio fuse might keep blowing if the radio itself needs an inline fuse in a 1997 Crown Victoria. It is possible that the radio and interior lights are not grounded properly. Installing an inline fuse between the radio and the fuse box may solve the problem of the fuse blowing.
There is a problem with the radio itself, or there is a short in the wiring, or that circuit is overloaded.
Check to make sure that your power wire on the radio is not grounding to the body of the radio. this will cause a short and thus blow the fuse.
i replaced the head unit and the fuse stoped blowing.
Did you cut factory plug for radio hook up?
Fix the fault blowing the fuse.
Check as much of the wiring to the radio as possible for shorting. Try completely unhooking the radio from the harness and see if it still blows the fuse. Do not go to a larger fuse size under any circumstances, this could cause a fire. Have you tapped into the radio wire for any reason, such as interior lighting, a radar detector, or a satellite radio?
a short is a cut in a wire and it will probally be behind the fuse panel if its for your radio.
If the radio fuse is blowing on a 1997 4Runner then there may be a short somewhere in the wiring. Search for the short using a volt meter to avoid any more fuses to blow.
you have a wire that is going to ground(electrical short on another wire or piece of metal).
Which fuse is blowing? Yamaha XV250 Virago Manual Cyclepedia.com
Which fuse is blowing. You need to be a little more specific so we can help you. the ignition fuse under the hood