Originally Posted by
TUSHHOG
In all my years I have never heard of a fuse getting week with age, maybe the fuse holders but not the fuse itself. As far As fuses you might get one that's bad, but the likelihood of gettin two at the same time is way out there. From what Holic says left side lights are out, which would be parking and brake. First place I would look is the left side tail light. Could be as simple as a bulb, if not he needs to look for a pinched wire. Start with the swing out trailor tongue and works it's way back