I have a 2008 Versa Hatchback. The positive battery cable is loose even though I have tightened it down several times. About once a week the vehicle wont start and I jiggle the cable and the care starts right up. This morning I had the issue. I jiggled the cable kind of vigorously and the car started. Then I noticed a couple of things. I turned on the wipers because of dew on the windshield. The wipers did this thing where they didn't move smoothly across the windshield, they just kind of skidded across a couple of times and then they stopped working. I also noticed that the rear defroster now does not work AND the headlights are on continuously even with the switch in the off position. The only way to get the headlights to turn off is to shut off the vehicle. Could all of this be indicative of a bigger problem, say the alternator or is this more of a relay/fuse type of thing? Any assistance is greatly appreciated.