Re: [Chrysler300] Surprising source of miss in 300 ?
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Re: [Chrysler300] Surprising source of miss in 300 ?

Thanks Marshall, I understand and agree. I need to  look closely and see what’s going on with the wiring. This acts like I have been putting 12 volts on the coil all along. I trashed the failed ballast resistor and took out the trash this morning. The ceramic core of the resistor which is in the back of BR was broken in half, but it is a wire wound resistor so it is possible the wire either wasn’t broken fully, or it didn’t matter because I had 12 v on it anyway. BUT, I did check the voltage on the coil running and it was as recall ca. 5v with the new BR.     

On Mar 4, 2016, at 10:49 AM, Marshall Larson <granitledge@xxxxxxxxx> wrote:

​It would be rare for a ballast resister to fail shorted or change resistance significantly but this could happen if the coils of the resister wire were twisted together which could cause a near short.  The normal failure is an open which will allow the engine to start but it will die when the key is released to the run position.
To test, disconnect one wire from the resister and start the engine.  If it continues to run when the key is released then you have 12 volts to the coil from the ignition switches' run position.  That will burn the points again and/or cause the coil to fail if it is a 6 volt version.



Posted by: Michael Moore <mmoore8425@xxxxxxx>

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