My cig lighter fuse blew I was just wondering if I ca put a 20 in there instead of a 15 cuz that's all I have right now.

 

Short term, sure. I personally try to replace fuses with the amp rating its supposed to be. Specific amp ratings are there for protection. If you put a bigger one in it won't blow when its supposed to. It'll work though, as far as letting power through.