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Take your test light alligator clip to ground and probe the posts at the junction block bolted to the firewall. The test light should light up on both sides. Carefully pierce the wire with the probe just on the other side of the black capsule on the fusible link. It should illuminate the testlight just the same as it did at the posts. If it doesn't replace the link. Also make sure you check the wires from the junction block forward. Do the same test at the 2 fusible links down at the starter solenoid. Remember the fusible link blew for a reason so find the reason if it is in fact blown before you replace it.
Here's my problem. Here is where the wire goes. It is the one in the middle. The one on the left is HOT, and both the middle and far right were barely lit up while running. Now, I am not sure where the one on the far right or the one on the far left goes. Or, if the thing is even working. I don't know what it is, is it a junction block? ThanksDo I trace the wire (the far right one) and find where it goes? The wire in the middle to the alternator is fine, it shows little resistance.