I think Heinz went through this a while back in a detailed post..?
I suspect the switch will come in two types, one with N,C. (Normally Closed) contacts, the other with N.O.( Normally Open) contacts, and depressing the switch button reverses the contacts from one to the other status... Yeah all a bit simple, but simple to buy the wrong switch too.... With the numbers posted hopefully that will be the correct type of switch for the brake light situation.
I think RS Components may have them in stock as the yellow label looks like one of theirs..?
