8 guage yellow wire going into firewall question

[86gtriceeater]

I have an 86 gt 5.0. Im putting a new wire harness in (also supposedly from an 86gt) and theres an 8guage yellow wire im confused about. On my old harness it starts from the starter solonoid and goes into the firewall but on the new harness it doesnt, it stops and has a female spade connector ending by the alternator...what do I do? Is the one going into the firewall necessary? If not I could just cut it? I need a schematic...

 

[jrichker]

See http://slantnosefox.com/picturehosting/jeremy/86 electrical & vacuum troubleshooting manual.zip you can download the whole set of electrical troubleshooting and diagrams for an 86 Mustang courtesy of Jeremy, AKA V8only.

It is a big 61 MB download that you get to unzip and save on your computer. It may take some time to download it, but the results are worth your time.