Took my 70 RR out shut it off and it won't turn over. got it running by jumping the starter relay on the firewall with the key on and drove it home. next several times starts fine but then it fails again. replaced relay still doesn't start. got a new neutral safety switch but its not too easy to remove so I plug in the new one, push in the detent to test and it still doesn't start. I'm assuming that manually pushing in switch should complete circuit and since it still doesn't start the original, still installed NS switch is not the problem. I've got a FSM but I'm electrically challenged and running out of cheap parts to replace. suggestions? TIA Greg