Ok, here's what I've been able to determine thus far...

I started with Plug 9(C) on the front of the passenger's side fusebox, since 11 (Multiplex A), 17(J), and 18(H) are on the backside of the fusebox and are tougher in terms of access. Plug 9 is right there once you pull off the fusebox panel trim.

I initially pulled plug 9 then inserted a new 7.5 fuse into fuse 13's slot. It did not blow. The locks work with the key in the off position! I was very excited. I played around with the locks for about 5 minutes with no issues. Next, just to make sure, I reconnected Plug 9. The fuse did not blow. I played around with the locks for a couple of minutes and the fuse held. Next, I placed the key into position "II" and played around with the locks again. I did a few cycles back and forth with the key in the off or "II" position, cycling the locks. Sometime during this period, fuse 13 blew again. I removed fuse 13 and popped in another, which blew at contact. Removed plug 9, put new fuse into fuse 13 and never could get it to blow...until I connected plug 9 and played around the the ignition again.

I have been unable to blow fuse 13 with plug 9 disconnected. Fuse 13 will blow with plug 9 connected. Sometimes the fuse will blow at insertion. Sometimes it takes while of playing around turning the key on/off, etc.

I haven't moved around to the backside of the fusebox yet due to the results I have obtained so far. I can test the remaining connectors if you like, but was having a little trouble removing the glovebox (which I am assuming needs to be removed to access the back of the fusebox). I'm normally a little more tenacious but I was working in direct sunlight. I could also use a better manual. I'm really growing to hate Haynes.

And thanks for the help so far. You've been very informative.

Also, just FYI: my clock has never worked. Display never shows anything. Always been this way.