How do I hook up a second car battery?

How do you hook led light wires to your car battery?

• I bought wipers that light up but I don't know how to hook them up to my car battery. I know the red wire goes to the + and the black - but how do I physically hook them up?

• Answer:

  Either to the fuse box or the wiper engine or the battery itself. You don't say what kind of car it is. Do the instructions say to go direct to the battery? If so, I hope it has an inline fuse (something plastic, usually white, partway up the wire). NOTE: I'm pretty sure you would NOT hook them up to the battery, otherwise they'd be on all the time and would drain the battery. More likely they go to the wiper motor or switch. What do the instructions say? Always disconnect the battery before working, though. To do so, take a wrench and remove the BLACK (Neg) battery cable, and set it aside so it doesn't accidentally hit the battery terminal. If you have radios with security settings, they may reset when you reconnect.