they seldom blow,but when they do it's usually caused by overload,bad or weak bulb or for no reason at all,they are simple to replace and inexpensive,I've only changed them a couple of times before,dont solder it,just use wire nuts,only 3 wires h-n-g,about $30.00....bonbon
http://www.damarww.com/print.asp?cat...rs&prod=02109A