Corrected relays, added gear ind to right system

Corrected relay drawings to show DPST and SPST of the real relays in
stock.  Rewired L relay to be powered by a switched circuit controlled
by ECU Select switch, because the actual relay is NO instead of NC.

Added Gear Ind CB to right system, so in the event of a L bus failure,
gear indication isn't compromised so the alternate gear extension isn't
so scary.  Expect this to be a 5A CB to power the three prox sensors.