7747 A/C enable

[JTesta1966 at aol.com]

In a message dated 8/6/99 3:55:18 PM Eastern Daylight Time, 
morepoweral at tetranet.net writes:

<< This is kind of a rehash of what most everyone else has stated, but..
  I don't recall any GM box supplying 12 volts to run anything. B+ is
 usually supplied straight from the fuse block to the device, and then
 the ECM grounds the other side of the device, to turn on whatever it is
 trying to ru >>

Yah...thats what I said first off..then went to using a 5 pin bosch 
relay...but yeah...you're right, pretty easy to reverse the op. As for batt 
pos trigger, the only one I KNOW is the fuel pump relay..that gets hit w/12V 
trigger...I assume a safty item since in an accident, inadvertently grounding 
the trigger (via bent sheet metal) wont turn on the fuel pump.

Jim