Don’t bother watching this. It’s excruciatingly slow and gives very little info. 9 times out of 10 it’s a weak battery, dirty terminals or bad alternator. EASY SOLUTION: Clean corrosion off the battery terminals (Cola and a toothbrush work really well), get a jump, run/drive the car about 20 mins. Done! If that doesn’t work and you still have probs, get the alternator checked.
