ArtooDetoo:you could also use a relay that will supply power when handbrake on but not when handbrake off using handbrake light circuit.Aaroona: Thank you ArtooDetoo for your reply! That actually is making a bit of sense to me. I will read over it again tomorrow when I'm not so tired and mention it to my friend. We're currently brainstorming a couple of ideas and I think this could be a winner.
We're also toying with the idea of the button only working when the clutch is pressed, or the handbrake is applied.
Clutch won't apply to me, as I have a clutchless manual, but to my mate is still possible.
Thanks again for your reply. Very helpful :)
Let us know how it works out.