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Fixing the old truck

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Joined: Apr 2019
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New Guy
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Electrical is not my strength.

Picked up a running ‘46 earlier this week, but the headlights don’t work. It seems the problem is at the voltage regulator.

Here is the wiring diagram- https://imgur.com/gallery/Dqhj7zL

Here is the wiring as it sits now - https://imgur.com/gallery/XVgcWGi

The voltage regulator has b, a, f, written on it. Do I just need to swap the red and yellow wires?

Thanks in advance

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It's hard to tell from the photos where the wires go, but it looks like the yellow wire is grounded to the V Reg case. If it is, it should go to the generator case/mounting bolt. The B (Bat) terminal on the V reg goes to the ammeter. The A (Armature) terminal on the V Reg should only go to the Armature of the generator. The F (Field) terminal should likewise only hook up to the Field coil connection on the generator. Make sure you have the two terminals on the generator properly IDed. Hope this helps.

Last edited by drdoug; 04/20/2019 4:52 PM.

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Thanks, I think you are right.

Detail pic of gen. And v reg with cover off - https://imgur.com/gallery/pxDHxfN

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Success!

...took me longer then it should.


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