Coil box wiring configuration

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Model T Ford Forum: Forum 2013: Coil box wiring configuration
Top of pagePrevious messageNext messageBottom of page Link to this message  By Robert Poane on Saturday, October 26, 2013 - 12:59 pm:

This is a repo wood box with later coils for a 1912 made to start on mag, but I put a starter on it also. There is no battery in it yet.

I know the battery wire goes to the bottom passenger side post and the mag wire goes to the bottom driver side post.

But in the original Heinz switch there is a wire connecting all four springs on the bottom to the center of the switch. In the later years is there a wire that goes to the center of the switch?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Robert Poane on Saturday, October 26, 2013 - 01:05 pm:

I discovered the problem. I am missing the copper contact strip that goes on the bottom for the later box.


Top of pagePrevious messageNext messageBottom of page Link to this message  By John F. Regan on Monday, October 28, 2013 - 12:46 am:

Yes on the early box there were 4 individual coil springs typically on the Heinz box and they were linked together. Those are electrically doing the exact same job as the one center strip in the later box so the "common" connection in the switch is the center contact and goes to that strip in your box. You might also note that the later coils also required that contact to move to the center in the bottom while the earlier coils had that contact located at a physically different location on each coil bottom. It was located toward the front surface but still at the bottom of the early individual coils.


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