I found this wire, while I was looking through my bay of the 89 roc. It was not connected to anything. I looked at my friend 90' formula and it had it the same way but grouped into a jacket with more wires. The wire is located on the passanger side, rides along the firewall and connects to another wire in middle of firewall sorta.

 

looks like secondary cooling fan wiring for dual fans

 

Does it plug into something?

 

I'm wrong, confused black/brown connector for temp gauge connector. Not sure now, will have to check mine.

 

Please do

 

it's the wiring to you hood light