So my trusty 1982 red cub 782 coughed once and died while mowing. I have replaced the coil, points and condensor. It turns over fine with a jump from my 1986 yellow 1811 cub .. It appears something is draining the battery, Sometimes the lights come on at the light setting on key and sometimes they don't. Both fuses are fine. What are my most likely culprits and what order should I check? Thanks for the help!