Voltage Regulator fail safe mode

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Model T Ford Forum: Forum 2011: Voltage Regulator fail safe mode
Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Boothroyd - Victoria, B.C. on Tuesday, June 14, 2011 - 09:36 pm:

If the Fun Projects voltage regulator (6 volt neg ground)has gone into a FAIL SAFE mode with a permanent ground short being placed on the generator post, can you test for this by testing for continuity between the regulator case and the generator post terminal of the regulator?
(with the regulator off car)
Regards,

Steve Boothroyd


Top of pagePrevious messageNext messageBottom of page Link to this message  By John F. Regan on Tuesday, June 14, 2011 - 09:51 pm:

The simple answer Steve is YES. A direct short between the forked terminal and the mounting foot with ohm meter on lowest resistance scale in each polarity is the correct test for this condition and the VR should be held in your hand for this test and not on the car. FSM will be an absolute direct short in both polarities between generator connection "fork shaped terminal end" and regulator case.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Boothroyd - Victoria, B.C. on Tuesday, June 14, 2011 - 10:15 pm:

Thanks John.
From the continuity test I made, my regulator has gone into FAIL SAFE mode.
The Generator has been repaired and is now working.
I will be sending the regulator to you for repair, and also want to purchase a new brake light switch.
I will contact you off line.
Regards,

Steve Boothroyd


Top of pagePrevious messageNext messageBottom of page Link to this message  By elton beougher on Friday, June 17, 2011 - 01:08 pm:

This a simple question. Is the electrical system positive ground or negative ground?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Wayne Sheldon, Grass Valley, CA on Friday, June 17, 2011 - 02:16 pm:

Simple question. Complicated answer short.
Model Ts were negative ground.
Model As were positive ground.
In the forties and fifties, many Ford mechanics, remembering model As, converted model Ts to positive ground. This, of course, creates a lot of confusion and requires checking and correction.
Drive safe, and enjoy, W2


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