how do i disconnect the battery to do this? because i dont want it to spark or anything, plus their is a rubber thing and i cant tighten in down, any ideas?
disconnect the negitive battery wire before working on the car. it'll always spark some when reconnecting the battery, thats normal and theres really no way around it.
the rubber thing your talking about, is it the cover over the positive post?? if so, just cut it so the new wire will connect and you can still keep the post covered.