Taking the plunge

Okay guys, I don't have a test light but I have a multimeter so I did some tests today.

With that fuse in, there is continuity between the positive battery post and the yellow wire @ starter relay with the key in ON. So, obviously there is a crossed wire somewhere that is allowing current to go to the start circuit even when the key is not in start. There is no continuity with the firewall plug disconnected, so I think the broken wire must be somewhere under the dash (before the firewall). My guess is that it's a completely broken wire and that's why it ONLY starts when that fuse is in. If that fuse is out, it won't crank even with the key in start.

So, time to find the crossed wires i guess! I don't think I can take the top off of the dash, I will take the gauge cluster out and see if that gives me a good enough view between that and laying on the floor of the car looking up!