On the road again,
I'm learning this stuff too. I don't know what a double contact regulator is, but wonder if your 1960 manual is pertinent to your '52 pickup.
When folks say to put the generator into full field output by grounding the field wire, they mean to pull it off the regulator and ground the wire itself . You will be removing it and not involving the regulator in the process.
This field wire from the regulator to the generator must be intact. This wire varies the ground to the field which varies voltage output.
A generator that makes noise and is hot is mechanically defunct. Worn bushings can allow the armature to drop, and rub and grind on the pole shoes.
I checked old posts, as I thought this road had been traveled before, but couldn't find anything.
If your generator made noise, got hot and quit charging, one would suspect the generator. If you replaced the generator and regulator properly, the system should now work. You indicate it doesn't.
I am not sure on this, but making the generator 'motor' might not be a true test of its integrity. The full field test would be a pretty sure bet. If this works, then it's the regulator or wiring between regulator and generator that might be the problem.
Stuart
