It was the brake light switch (or has to be).
Did the check you suggested plus I closed the circuit with a off-cut of electric wire. +12v at the plug with the multi meter and lights on with the closing of the circuit. (What did I do wrong with the first short circuit? I didn't have the keys in the ignition at one click prior to start engine). Rookie's Mistakes 101.
Will be getting a new brake light switch.
Regards
Andrew

