Not exactly a hazard light, but I did install a unit to make my front headlights blink.
Didn't seem to be too popular with folks though...
http://www.r3-forums.com/forum/554-electronics/82321-installing-blinking-headlights-safety.html
Didn't seem to be too popular with folks though...
http://www.r3-forums.com/forum/554-electronics/82321-installing-blinking-headlights-safety.html