Packard 120 appears to be overcharging

[pint4]

I am trying to trouble shoot a problem with the electrical charging system on my 37 Packard 120 with Autolite voltage regulator and generator.  My gauge on the dash  is pegged out showing I am charging at maximum.  I had the generator and regulator both taken to a local automotive generator rebuilder shop and they said both checked out good.  Any ideas as to what to try next?  The generator has been rebuilt and the wiring in the car has a new harness from Wiring Unlimited.

Thanks,

Bob

[Owen_Dyneto]

Symptoms indicate a grounded field.

[pint4]

Can you elaborate on what to look for when you say grounded field?  Are you referring to a bad ground wire on the generator or voltage regulator?

Thanks,

Bob

[JWLawrence]

You may have a grounded field wire in the generator. When the field is grounded on the generator the regulator is basically by-passed and the generator will charge a full rate. This is also a test when there is no battery charging indicated. It will reveal if the generator is functioning.

 

(o{}o)