battery hook up
There is a long red cable that come out from under the passenger seat does that connect to the negative or positive part of the battery
Usually a red cable is positive but first lets find out what the cable is for and why is it under the passenger seat. Do you know where the other end is? Is this a "VW battery under the seat" thing?
It is the battery which is right behind the passenger seat, and you have to turn the seat all the way around to get to it. The red cable comes from under the passenger seat, and I don't know what it's connected to, because I would have to take the seat out to find out. This is a VW vanagan camper.
It looks like someone added those wires. I didn't know that it was a camper in your other question. The wires could be feeding a heater. Chase them down before hooking them up.
Looking for a Used Vanagon in your area?
CarGurus has 34 nationwide Vanagon listings and the tools to find you a great deal.
Search Volkswagen Vanagon Questions
Volkswagen Vanagon Experts