wipers, relay or not?

Ok - think it's sorted now.

Just a bit annoying that the only way I could get it to work was to include another relay in the circuit.  So I get a relay-click every time it hits park.  But at least it works!

This is the complete circuit as it is now.  If anyone has any good ideas for getting rid of the relay then lets hear em!

I suppose, at the end of the day, it's a pretty noisy car as it's for the track and not the road so the relay clicking on and off isn't going to make a massive difference.  I'll mount it somewhere where it won't be too easy to hear it.