There should be a total of 4 ring terminals but 7 fusible links.
1. a. Blue = Alternator
2. a. Green = Ignition Switch
b. Orange = Fuel Pump Relay
3. a. Green = Fog Lamps/ Fuse Box / Engine Lamp
b. Green = ? (think it also goes to fuse box for other components)
4. a. Orange = B+ Latch Relay
b. Green = Fan Control Relay
Unfortunately the colors above only indicate the fusible link colors, I don't have what color wires they turn into after the fusible links end, and as they go to their respective destinations.
Since the its the green fusible link that's shares a ring terminal with an orange fusible link I feel that nails it down as the Ignition switch Fusible link. That fusible link at the very least needs to be replaced. That wire should go straight to the Ignition switch.
The fusible link colors indicate the Gauge.
Blue = 12 Gauge
Green = 18 Gauge
http://www.oreillyauto.com/site/c/detail/DOR4/85625/N0220.oap
Orange = 20 Gauge
You still need to find out cause it to go out. So doublecheck all the ignition switch wiring, replace the ignition switch (they're like 10 bucks). And check the fuses, mainly the fuses that control electronics power by the ignition switch. The fuses that are powered by the ignition switch are ABS Fuse, Power Windows Fuse, Clock Fuse, TCU Fuse, Gauges Fuse, Blower Fuse, Rear window wiper fuse, Turn/back up lamps fuse, and Radio Fuse.
If a previous owner jumper bypassed one of those fuses with a jumper wire or used a fuse with a higher rating, and then the component it controls shorted, that short could work its way back through the ignition switch and cause the ignition switch fusible link to die out.