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Shoot, I didn't even disconnect my batteries. I was just very, very careful about with the loose power wire and what my socket wrench was close to touching. I even left those suckers connected when I had to change my alternator in an O'reilly's parking lot last week while on the road away from home.
It can be done obviously, but all it takes is a split second of inattentiveness and you have a major headache. It's worth the few seconds it takes to disconnect the batts...
Yeah ok, not the recommended procedure but for the time it took to do, I'd do it that way again. It would have taken me longer to reprogram my radio and clock than it took to swap those wires onto another relay.
It would have taken me longer to reprogram my radio...
Ok, so the logic may be a bit flawed, but that was my reason too for not unhooking the batteries. My aftermaket radio (Alpine) has a bunch of different customized settings that I didn't want to have to set up again. Well, except for the alternator...in that case, it was cold and windy, I was in a parking lot chaning it, I was in a foul mood because of the problem, and I just wanted to get it done and back on the road.
Funny, because that's exactly what I did when I changed the alternator. I happened to have some leather gloves in the toolbox that I put over the hot wire.