On Nov 29, 2:52*am, micky wrote:

snip

Could hitting the guard rail blow the fuse?

Yes

Ever heard of this happening?

Yes

How?

Impact grounded a hot wire in an unprotected loom near a sharp piece
of sheet metal and caused a momentary short. Fuse blew. Wire loom
moved away from sharp metal edge and new fuse worked for some time.
Later mysterious fuse failures finally traced to fault. Happened to be
behind instrument cluster in dash of a BMW.
Given the situation described, it would be wise to keep off rough
roads and carry extra fuses for a while.

Joe