Every time I plug my 12 volt air compressor into the socket, it blows the fuse. The compressor is brand new, & it works fine in my truck's cig. lighter. The original fuse was a 3amp. I put a 5amp in it, & it still blows. The question is, what's the highest amp fuse I can use, without causing any problems? The cell phone charger, & radar detector work fine as is. I guess the compressor just takes a lot more amps to operate. Thanks in advance for any suggestions. I sure don't want to burn nothing up, because I put too big of fuse in it.