oregonmtnman23

So I have a wire that is fried that comes from the ignition Switch.
There's 2 16guage wires (Red/Black Stripe and Black) that have continuity when the key is turned to the start position.
Something Caused the Black Wire to fry all the way to the ignition Switch and I can't find any wiring diagrams to locate what these 2 wires go to.
Please Help!
All the Heavier guage wires are in the diagrams.

74RX4

iTrader: (10)

That would be the brake light checker. You can't find it on the wiring diagram because the colors are labeled incorrectly. The 84 diagram, section C, shows Black/red instead of the correct Red/black colors.