'90 burb electrical, fusible link?

[b79holmes]

Hi all,
A couple weeks ago my alternator started making some bearing noise, so I sent it out for a rebuild yesterday. I got it back this afternoon, and as I went to install it, my hand slipped. The alternator fell onto the wires that normally bolt onto the back of it and I was suddenly reminded that I completely forgot to disconnect the battery! Man was that stupid...

There was a bright spark from where I dropped it, immediately followed by a big cloud of smoke coming from the area of the battery. Now it seems half my electrical system died. Wipers, blower motor, brake lights and hazards all still work, but the headlights, dash lights and interior lights don't. The engine will still turn over, but it seems I have no ignition.

After looking through a handful of forum posts both here and elsewhere, the symptoms most often seems to happen because of a blown fusible link. The ones I saw mentioned most frequently were near that electrical junction on the firewall up and inboard of the brake booster. I see two of those black useable links, and I tested both with the ohmmeter. Power seems to be getting through.

I know there must be more fusible links on this circuit, but I'm not sure where to look. I did pretty thoroughly check around and under the battery (where most of the smoke came from) and I don't see anything that stands out as melted or damaged.

I'm kinda at a loss at this point, so if anyone has suggestions for things to check out, that'd be greatly appreciated!

The truck is a '90 burb V1500, bone stock and mostly original.

Thanks in advance!