1975 2002, won't start unless I get it jumped- then it starts really easily. I had the alternator checked (35 watts) and battery (14+ volts). If I disconnect the battery (neg) every time I stop then it will usually start back up (80%)- depending on how far I drove it before I parked. How do I check the ground wire- and where do I start when looking for a bare wire. I"m car illiterate, but I'm learning. -Thanks