Motorhome Lights

Found my problem on my running lights....Bad Fuse...I fail to tell all I was attempting to put LED lights in the rear of coach when my lights went out. I wanted to have brighter lights but can't seem to get the right LED's to work. I change them out (1157) but still does not give me more brighter lights or will blow the fuse I guess. It seems it would be a simple change out but I am not having any luck.
Any suggestions would be appreciated and I did appreciate the input on my topic....very helpful as usual. Thanks