Re: 1937 Battery Draw

Posted by HH56 On 2022/10/30 10:49:09

References have the VRR series used mostly on Mopar and some Hudson models. Perhaps one of their diagrams would show the actual terminal layout.

If not, the regulator terminals should be labeled. Sometimes they are stamped or silk screened on the cover or the regulator body very near the terminals and sometimes they are even on the bottom and you will need to look under the regulator. Other times there is a label stamped directly on the terminal metal extending from the regulator but you will often need to remove the screw and sometimes along with a square metal tab that goes over the wire connector before the stampings can be seen.

There is not a consistent label or terminal placement as it differs by mfg and type but typically US regulators having 3 terminals will have a "B" or "BAT" at the battery connection. Wires coming from the generator will connect to "F" or "FLD" for the field wire and the armature wire will connect to a terminal labeled either an "A" or "ARM" or maybe "G" or "GEN" which stands for armature or generator.

Some regulators have extra terminals such as a specific ground connection and in some of the 40s senior model regulators, another terminal usually labeled "S" or "START" where a circuit that prevents the starter motor from energizing if the engine is already running will connect. Models with the 356 engine and Autolite gear reduction starter sometimes used that regulator.