He wants a 1x1 brick (I assume plate) that is a vehicle. It has no seats. Might I ask what for?
using the onvehicletouch event, you could make it look like it is completeing a circut.
onvehicletouch-self-toggleeventenabled 1
onrelay-wireB-firerelay
thus enableing when wireA fires a relay to the brick the vehiclebrick touches, wireB gets a relay.
the code needs a bit of help so it stops when you take out the brick, (wich may need a few variables added when the brick touches it.)
P.S. its a 1x1 brick (not plate)