never had this problem before #19 fuse keeps blowing as fast as u turn on lights.this is for rear,front running lights and dash lights anyone know what could be wrong?what i could check?any info would be helpful thanks

 

Unplug the front and rear running lights and the dimmer switch one at time to see which one prevents the fuse from blowing.

 

ended up checking illumination wire on aftermarket radio it was bare and shorting out.thanks for your input though