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By Richard - 8 Months Ago
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Recently I was baffled by my distributor and coil system was not producing a spark at the plug even though I was getting power to coil and distributor. Out of the car and on a test fixture spark was produced. I tested a few distributors and coils all the same results. My wiring harness is a reproduction appearing in good condition.i hooked up a headlight bulb to a load on to see if it would light, it didn’t.
I made some ten foot jumper cables going from the ignition switch to the coil, it lite the head lite bulb
 . Got spark and determined something amiss in the wire from the ignition switch to coil so I replaced it an all is good.
Point being even though the original wire produced twelve volts apparently there was not enough amps to push it.
Attached is my test fixture
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By miker - 8 Months Ago
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I like the test fixture. Got some of that strut out in the garage, but wouldn’t have thought of that. Last year I finished fighting a problem like that. A wire that carried enough voltage to read good, but under load had enough resistance to drop the voltage below what a starter solenoid required. Glad you found it.
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By miker - 8 Months Ago
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Removed duplicate
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