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need wiring diagram for a 1909 open touring.

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we recently got a 1909 open touring in our collection. The battery box has all but 2 wires missing.

The 2 that run from magneto switch to the magneto. the rest are missing. Anyone have or know where

I could find a diagram?

Thanks

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During that period most wiring diagrams are not auto make specific but rather make of electrical equipment.

What make/model of switch/coil and magneto do you have?

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I am thinking that Jacobson-Brandow made coil boxes that worked with a timer. Your Bosch magneto dates from 20 years after the car so perhaps is a replacement for the timer. Can you post pictures of your equipment?

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Your existing coil box appears similar if not identical to units used on Model T Fords. If so, the engine side would be laid out like this Kingston unit. the Ford diagram would apply. Note that your engine would have a timer wired to the coil box, a typical timer is pictured. The wiring diagram shows 1911 Hudson with a special coilbox that controls both that box and a magneto. The idea is to start on coils using a battery then switch over and run on the magneto. Your existing magneto with start the engine if you crank fast enough, it is not capable of making spark from battery power. The idea in the old days was to prime the engine, then turn on a battery powered system that would spark the plugs thereby starting the engine with not hand cranking needed. I am going to guess that your engine has 2 sets of spark plugs. What does the engine side of the coilbox look like?

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Assuming the car was running with the wiring as received, the (after-market) magneto is "high tension" and the two wires to the switch are to ground the mag to kill the ignition.

A high tension magneto requires no battery and has no external coil.

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