Hello,

I have no switched power to my radio (yellow wire) as checked with my multimeter. All fuses in the main fuse box (on the left of the column) are good, including the CTSY fuse, and my lighter, horn, and courtesy lights are all working. My convenience center (to the right of the column) has no fuses in it. What am I missing? Is there anything I can fix/check short of pulling the wires out of the dash and looking for a break in the wire?

Radio constant power = CTSY fuse

Start there

Of course, if somebody has hacked up the wiring, all bets are off. You'll just have to figure out what they hacked, and how they hacked it. Us out here aren't gonna be able to help you all that much with that, because as late at night as it is, we can't see clearly what's been HACKED UNIQUELY in your car; it's just too dark out. Because that's how it works: every hack is UNIQUE. You, the one working on it, has to identify what the HACK that HACKED it ... HACKED UP.

No wiring hackery, ive got the factory radio plug still wired in there.

CTSY fuse good

I assume the yellow switched 12v wire is fused, any idea which fuse it’s tied to?

That yellow wire "should" be connected to the Radio fuse...

YUP ! This is the fuse lay-out for an 86 Firebird.

Thanks all. I've confirmed (with multimeter) that i have power to the yellow wire where it comes out of the fuse box, which means...there is a break in the yellow wire somewhere buried in the dashboard! I suppose i'll have to fix that somehow. will probably splice a new section in close to the fusebox and close to the end plug too