Re: Converting back to six volt

Posted by HH56 On 2024/5/12 21:12:10

Yours appears to be a colorized version of an AEA drawing and since senior models didn't have electric wipers it may be sort of like some Packard diagrams where they issued a combination drawing for an entire series but left it up to the mechanic to determine whether or not a model had a particular feature and if he needed to use or discount any wiring shown for that feature.

The black wire in question shown connected to the regulator ARM terminal on your first photo was part of a starter safety circuit in senior models where the solenoid has a terminal which got ground thru the generator armature and coils that are connected to ground on one side. The wire only provided a ground if the engine was not running. Once the engine started and generator was putting out voltage, that black wire being connected to the generator armature output was then at the same voltage level as the wire coming from the starter switch. Since there was no longer any ground as long as the engine was running the solenoid could not pull in and accidentally energize the starter motor.