I found some pictures online of the wire harness going into the search unit and it looks fine. So I'm back to checking if the search unit wipers revolve and S1 & S2 solenoids operate. The search wipers do revolve but nothing happens with S1 and S2. I've also changed the mechanism control relay.
According to the manuals explanation of the sequence of operation, after the letter and numbers are locked in, the search unit wiper (front of the commutator board) runs into segment 8, a circuit is completed to energize sprag relay S1. First of all, where is segment 8 and how do I check to see if S1 is getting any power? I've already adjusted S1 and S2 according to the manual but no luck. Still the same, no pins being pushed out.
Manual troubleshooting guide also said to check wiring from push buttons to search unit printed board. Being a newbie at this stuff, I have no idea how to check all of these wires.