Finally tracked down the wires of the annoying reminder bonger that goes (& goes & goes & goes) when key is in ignition and door is open. This is the switch - very low power, bottom connection didn't even light circuit tester lamp to earth
Plug under bottom of steering column
Simply pull out and viola - silence...............ahhhh
muhahaha I have found the evil contraption on my 70 series it is located near the passengers left foot, next to the 4wd computer. its called a 'key reminder' its a surprisingly complicated circuit with a 10 pin chip on it. Its in about 10 peices now.