voltage regulator question

Anonymous-0 · Jun 14, 2012

If the voltage regulator on a Super M is gone, would a side effect be headlights that do not work? At Idle, battery posts show a very jumpy 6.09 and when stopped, battery posts show 6.12. Lights have new wires grounded to the steering post, they dont work.

rustyfarmall · Jun 14, 2012

(quoted from post at 05:23:26 06/14/12) If the voltage regulator on a Super M is gone, would a side effect be headlights that do not work? At Idle, battery posts show a very jumpy 6.09 and when stopped, battery posts show 6.12. Lights have new wires grounded to the steering post, they dont work.

A fully charged 6 volt battery SHOULD read right at 7 volts. Anything less might indicate a problem with either the generator OR the voltage regulator.

The headlights not working is un-related. Either they are wired incorrectly, the switch is bad, the bulbs are bad, or most likely, you still do not have a good ground.

Wayne in MN · Jun 14, 2012

Each cell of a lead-acid battery will read 2.1 volts when fully charged. 6 volt battery will total 6.3 volts; 12 volt battery will total 12.6 volts. If the battery has just been charged the readings will be higher until the battery cools and normalizes.

Janicholson · Jun 14, 2012

Lights not working is possibly related. THe Vr on some series (or who knows what was installed) had direct output to the light switch. This would be a 4 terminal Regulator. Bat to amp meter.
Arm (or Gen) to generator Armature terminal. Field to Gen field terminal (F). and an L terminal to the lights. If it did not have that L terminal, and was not wired for it, it would not affect the lights.
Jim
Diagrams and alternator options

Bob M · Jun 14, 2012

Pat -

As wired from the factory the light switch gets its power from the regulator "L" terminal. If the VR is missing and the light switch hot wire was not relonnected to another source of 6 volts, the lights will indeed not work.

Also, from the factory the lights should have dedicated ground wires. (The steering post is notorious for grounding poorly or not at all). Suggest running a ground wire from each light and attaching it to the BASE of the VR.

A fully charged 6 volt battery should read about 6.6 volts at rest. Your voltage readings suggest the battery is somewhat discharged. Also that is not being charged when the engine is running - exactly what you'd expect when the VR is missing(!)

voltage regulator question

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Anonymous-0

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