Thanks soms, this contact was ok, further investigation revealed an old repair
(spade connections) behind the rear door,took panel off corner of tub and there found the repair job, cleaned connections and now ok, strange thing was live wire showed 10.4 volts which I thought would have at least given a dimm light.
cheers jim.
Now I need to fix handbrake switch, but looks like something broke off it as there is a spade connector lying loose next to switch but cannot figure out what is actually broken on switch!!!