Re: how do you engage the overdrive?

Posted by HH56 On 2021/4/21 11:03:09

Nothing on a stock Packard except maybe some of the voltage regulators is polarity sensitive. Some regulators are designated positive or negative ground but so far no one has provided any official documentation as to why or what there might be as a difference. Speculation has it because of coating or composition of the regulator contact points being different to lessen arcs when the contacts open and close but no proof of that. The generators are repolarized when battery polarity is swapped and even those regulators that are designated seem to function and keep charging properly although it could be their life is shortened.

If the car has had any modern conversions that use solid state components such as the old style radio vibrator replaced or a modern instrument voltage regulator or more commonly, LED light bulbs installed then there could be issues with those items.