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Old 09-25-2020, 04:28 AM   #15
shew01
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Location: Roanoke, VA USA
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Default Car Will Not Start--No Apparent Spark

Quote:
Originally Posted by GRutter View Post
Look at the attached image, originally posted by another member. It is one of the best, simplest diagrams to understand the Model A ignition circuit. If you have power to the points if opened and closed, you have dirty points or a grounding problem.

Thanks. I printed out that diagram a while back. There is another one that seems to be pretty good too.


I’m leaning toward a grounding problem. The voltage is not correct on the junction box or open points, and the car was running too well before it suddenly wouldn’t start. I’m wondering if the rebuilt pop out switch is the culprit.

Both is these diagrams seem to oversimplify the junction box. More than just the ammeter is connected to the junction box.

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Last edited by shew01; 09-25-2020 at 04:35 AM.
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