This must be a new change in their policy.  I bought the -2 units for both my 1955 Thunderbirds.  Once I discovered the problem and spoke to 3 different techs about it, They send me an email with the wiring instructions for the relay.  They did not offer to send me one for either unit.  I was told that due to the small quantities of these unites they sell, it was not cost effective to include the internal electronics to make the generator light work.  It is nice that they have partially rectified the situation. 

UPDATE:
FYI: The 6V (-2) unit now includes the relay & instructions.  Built on request.

6 VOLTS/POS. GRD. NW INDIANA

That’s weird. I guess they just expected us to get used to the gen. light being on all the time their unit was working, which would likely require frequent bulb changes.
I don’t get why the 12V (-2) units are any different.  They must include some kind of relay circuit that breaks connection to the gen. light when powered.  Plus, would a relay circuit still provide the varying bulb brightness of the orig. OEM setup, that indicated power draw intensity?

6 VOLTS/POS. GRD. NW INDIANA

I have two 1955 Thunderbirds that I have put the Powermaster Power Gen alternator on.  They do make one with the terminal for the generator light, BUT there is a catch.  I have installed the 12 volt version on all 4 of my mid 50's vehicles and I absolutely love them!!   A few years ago I was at SEMA and I asked the representative if they made the 6 volt version with the generator light terminal.  He told me that I just needed to order one with the -2 at the end and it would have the terminal.  I finally got around to ordering the units and installing them and then I discovered a problem.  I installed the unit with a hot wire to the output terminal in the back, and the ground wire was also installed.  So far, so good.  Now I hooked up the generator light terminal and even though the alternator was charging, the generator light continued to illuminate.  I called their technical and got a few BS answers about how you can't connect the generator light wire from the alternator directly to the wire at the regulator that feeds the light.  After a few calls and having none of their supposed fixes work, I finally got someone who understood the problem.  Apparently they do not sell enough of these units to put an internal system in them to make them work like their 12 volt units.   They told me I had to buy and install a relay in the generator light circuit.  They then gave me the part number for the relay and instructions on how to wire it so that the light will work.  It is unfortunate that they did not include these instructions with the unit, since someone in their engineering and technical department knew that the normal wiring would not operate the light properly.  

6 VOLTS/POS. GRD. NW INDIANA

6 VOLTS/POS. GRD. NW INDIANA

Have you polarized the generator after replacing the regulator?

John - "The Hoosier Hurricane"

Just have to determine which electrical components differentiate between the T-Bird & passenger generators (aside from the end plates), and ID the part #

Do you have the GEN ID NO?

____________________________

It appears you solved the problem of a stuck cutout relay as you haven't reported seeing a spark when connecting or disconnecting the battery. However, the generator is not building up enough to close the cutout relay in the new regulator indicating issues within the gen. Is the vehicle's grounding connections good,tight and clean? Especially the grounding wire from the regulator to the generator? What would be the possibility of finding a shop or auto parts store with a generator/alternator test stand to test your generator? Or, open up the gen and have a look sniff and see, like nothing to loose doing that. A lot of good information on this thread that suggests an alternator conversion would be a good and reliable way to go. I would guess a 6 volt alternator would improve the electrical system in ways the 12 volt alternator did for the 12 volt cars, like producing charging current while the engine is idling just to name one. 



64F100 57FAIRLANE500

6 VOLTS/POS. GRD. NW INDIANA