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So I bought a 2007 Base model from a dealership, and they didn’t know what a switch did that was wired in pretty crappily; so I took the dash apart and traced out where they go. They run to some kind of booster or something off of the brake reservoir, but I’m not really sure what it is or why it’s wired up there... any ideas?
Yep, line lock. I have that same solenoid on of of my cars. Looks the former owner either enjoyed burnouts or drag racing or both.
That's a common mod for a stick shift car.
Good lord, look at the quality of that wiring job. If I were you, I'd remove that terrible job and at least replace it with better wire ( use black insulation so it doesn't stick out like a sore thumb).