'87 Ignition Switch Circuit Question

[rcamacho]

I'm wiring up an aftermarket radio and would like the IGN radio circuit to be powered on with the first key position. Anyone know what circuits the first key position activates? ?-run-start.

I do have the Chilton diagrams for '87 but the suck.

 

[dyeager535]

take a voltmeter to the top empty terminals on your fuse panel, and test them.