Always something, the battery and brake light came on for a second or two then went out. This happened maybe 4 times in a 30 mile trip. I thought I had checked the ground wires for the alternator but I will check it again. I did have trouble tightening the positive batter clamp. I had to bend it a little for it to stay on, there is actually no way to tighten it any other way. Any suggestions why the lights came on and went off?