Generator / Terminal 1 Question

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Boaski
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Joined: Mon Feb 11, 2019 9:01 pm
First Name: Todd
Last Name: Retterer
* REQUIRED* Type and Year of Model Ts owned: 1919 Touring
Location: Climax, Ohio

Generator / Terminal 1 Question

Post by Boaski » Fri May 17, 2024 10:39 pm

Over the winter I did the following to our 1919 T:
-Replaced the entire factory wiring harness
-Had the generator rebuilt by Brent Mize
-Installed a MTS voltage regulator
-Cleaned the contact points on the ignition / light switch
(along with a bunch of other stuff)

Tonight I noticed that there is voltage present on terminal1 (yellow and black wire) even when the ignition key is off. Is this normal?
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Mark Gregush
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* REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1948 F2 Ford flat head 6 pickup 3 speed
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Re: Generator / Terminal 1 Question

Post by Mark Gregush » Fri May 17, 2024 10:45 pm

Yes that wire as long as the battery is connected, is hot. That is why if you remove the generator or cutout the battery should be disconnected.
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1948 Ford F2 pickup
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Steve Jelf
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Re: Generator / Terminal 1 Question

Post by Steve Jelf » Fri May 17, 2024 10:57 pm

Probably yes. Your electrical system may differ from the 22-27 diagram, but yours probably takes current from the battery, through the ammeter, and eventually to terminal #1.

March 1922 to 1927 Wiring Diagram.jpg
The inevitable often happens.
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TRDxB2
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Re: Generator / Terminal 1 Question

Post by TRDxB2 » Fri May 17, 2024 11:30 pm

YES. look at the ignition switch in the diagram an and follow the yellow/black to the ignition switch and then to the ammeter where the yellow wire from the battery is connected to the other side. So your seeing battery voltage anywhere on the yellow/black wire even to one side of the horn button
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Starter with dash ignition switch.png
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TXGOAT2
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Re: Generator / Terminal 1 Question

Post by TXGOAT2 » Fri May 17, 2024 11:32 pm

The yellow and black wire at the generator is always hot. NO fuse on the stock system, either. Key on, key off, does not matter.
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Topic author
Boaski
Posts: 56
Joined: Mon Feb 11, 2019 9:01 pm
First Name: Todd
Last Name: Retterer
* REQUIRED* Type and Year of Model Ts owned: 1919 Touring
Location: Climax, Ohio

Re: Generator / Terminal 1 Question

Post by Boaski » Sat May 18, 2024 8:11 am

Thanks for the responses. I just wanted to make sure that I didn't put something back together wrong when I had the switch apart.
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