Wiring up an idiot light for an alternator.
I have put an alternator in a pre a 1950 Oldsmobile. I would like to use an idiot light rather than a volt meter. I'm using the original ign. switch which is a three post switch. Post 1 is battery feed. Post 2 and 3 are hot when key is in the on position. (there is no acc. post on this switch) The starter is controlled via a push button which is activated be post 2. I'm using a one wire internal alternator. Its my belief I should wire the indicator lamp in series with the exciter wire. Hot feed to lamp (from post 3) ....lamp to exciter post on alternator. This doesn't seem to be correct as the lamp will turn on with the switch, but does not go out once the car starts. I'm sure someone out there has the help I need.