My right runing lights fuse blew lastweek I replaced the fuse two or three days later it blew agian.

It's never done this for 6 years until now.

Do's anyone know why it is doing this?

 

You have a short somewhere in that circuit. The circuit is probley shorted and bypassing the load(the light) and your fuse is doin its job of protecting that circuit ;-)

Grab a multimeter and start probin, or send it to a shop =p

 

i had a similar issue with my wifes subaru , it blew the fuse , replaced it , blew again, replaced it again, blew again, so i went and bought another pack of fuses from a different store, and put the new fuse in and no problems after that. maybe you have some bad fuses...