The alternator on my 91 Accord (both the previous alternator and the replacement) sometimes charges. and somtimes does not. This morning the voltage at the battery (engine idling) read 14.5 volts. Then this afternoon it was 11.9 volts. I am also fairly certain that there is a short somewhere in the electrical system (test light on between disconnected negative cable and negative battery post), but I am not able to find the fuse to pull that will stop the draw. Any help would be appreciated.