Initial start up dashboard lights - 405 2nd build

Hi

This is just a niggle, but the "START" light should come on when the
ignition key is first turned and should go out after the engine starts -
other light associated with this is the red "overheat" light on the temp
display bottom right of the temp control display.

I know that both panel lights are ok because they light up ( a bit dim) very
occasionally after rain/damp weather. Put it this way - I get a shock when
they do come on and initially think that there is a problem but then realise
that this is what should happen.

Can anyone let me know where the sensors are located.

I could then try and clean the contacts to see if that is the problem.Maybe
requires a new sensor(s)?

Also the air bag light does not illuminate on start up, or the "water in
fuel" light.

Any thoughts on this?

ta