Why would the state of the trigger matter. Relays exist whose coils require maintained and pulsed triggers. Determine in the field the output of the 12v trigger and order the oppriate relay. I would disagree with the previous advice in this one respect. I believe you should use at least one 3PDT relay so you can interlock the trigger of each relay. I posted a similar question on the Yahoo site and Bruce passed on a link to a 12v site which had lots of cool circuits intended for the car audio market but with different relay coils could be for any voltage. Unfortunately I have the link on my lap top ( I'm on my newly repaired desk top ) which is why I haven't posted earlier.
Alan
"This is a Christian Country,Charlie,founded on Christian values...when you can't put a nativiy scene in front fire house at Christmas time in Nacogdoches Township, something's gone terribly wrong"
