Hello All,
I am in need of some Ideas about my intermitent starting problem.
Most times turn the key it starts. Every so often the starter will not  turn.
I hear the pump hum
but no action. If i run around and use my jumper  that i have mounted  on the
starter and touch the wire to the positive terminal of the alternator it
starts. My thinking is that if the starter motor/selinoid were bad this would
not work. I have replaced the switch and removed and cleaned the starter
connections and ran a second ground, should I also run a duplicate
Positive wire from the switch to the starter? this being a automatic  trans
the neutral switch
does not seem to be the problem because it happens in park or in neutral  but
if i run around and use the jumper it starts. Very puzzaling.

Jim Morgan 86 GL " bread box" automatic 219,950.0 miles