I replaced the fuse in the 12v plug on my sirius sportster radio but still does not work in the car. I checked the fuses in the vehicle and they are good, I pluged other devices in to the lighter and they work fine. I use my sirius boombox and it works in the house. Just wondering what else can be the problem

SOURCE: Sirius Sportster car kit - blown fuses

Try the other adapter and see if it works without blowing the fuse. If that fuse blows also, something is wrong with the radio.

SOURCE: No Power...Keep Blowing Fuses

you have a live going to ground meaning a live wire is touching another wire or touchin the caseing thus blowing your fuses
regards Doug

SOURCE: my fuse blows everytime i plug in my sirius radio

is that the only device that is blowing a fuse? if it is the only thing blowing your fuse you may need to replace the charger. check the fuse to make sure it is the correct size ( usually 10 amp). check the power adapter to make sure there are no loose connections or anything in the plug that doesn't belong there. unplug the radio from the adapter and plug the adapter in without the radio see if the fuse blows . if it blows replace the adapter. if it doesn't blow the fuse check the adapter to make sure it is the right one make sure the polarity is correct