More On Indicators and Other Stuff

Found the US/UK switch - just hanging under the dash. Tested the amber ones - they are nothing special and when fastened on they look really weird. They are 18w 12v for some reason (never seen anything but 21w before - maybe they really are motorbike ones) - festoon bulbs.

Removed dash - heater problems are caused by:

1) "Air" cable to fresh air flap broken (at heater end), allowing flap to open/close at random.
2) "Temp" cable not attached to back of heater controls.

Also noticed that where the heater meets the fresh air inlet there's a large gap - pulled out some rotten sound insulation from here.