1957 F100 coil resistor
Cargo Master
Joined: Mar 2008
Posts: 2,562
Likes: 207
From: Washington
Are you currently using an external ballast resistor, or a long resistor wire from the ignition switch?
What is the primary resistance of the coil you are using?
What is the KEY ON , engine not running, voltage currently at the coil positive?
Jim
Last edited by JimsRebel; May 12, 2026 at 06:20 PM.
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Trailering
Joined: Sep 2025
Posts: 17
Likes: 2
Is this a points ING system?
Are you currently using an external ballast resistor, or a long resistor wire from the ignition switch?
What is the primary resistance of the coil you are using?
What is the KEY ON , engine not running, voltage currently at the coil positive?
Jim
Are you currently using an external ballast resistor, or a long resistor wire from the ignition switch?
What is the primary resistance of the coil you are using?
What is the KEY ON , engine not running, voltage currently at the coil positive?
Jim
Also need to check key on voltage at positive side of coil.
Last edited by BCP9875; Today at 09:18 PM.
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