(First posted on MX5 nutz forum in January 2016)
Winter time = need rear demist. So I made up a circuit with an old relay I had from some old project donor car and an LED rocker switch I had spare.
quick circuit test
switch fitted
wiring and testing
All done. Now I can see out the back. 
Bit of a mishmash of switches though which I really don’t like. Switch on the right was obviously thrown in by whoever imported it for the fog light then the one on the left must have been done a couple of owners ago to operate the lazy eye lark then I’ve put yet another different one in. Might have to replace them all one day.
