broken

I have a 99 tahoe lt and I just bought it and me and my dad are fixin it up. One of the problems it has it that the 4hi light stays on then shuts off after like 5 mins and SES light comes on. Upon further exam I found a wire in a corrugated sheath on top of the chasis cross member right below...

Many of you are in the same boat as me. Some douche comes by at night gets a little too close to the Hoe and hits your mirror. Which in turn pops the spring off of the plastic housing and your left with a limp mirror (lol). Not wanting to pay 175 for a brand new one, and not wanting to pay for a...