Fried my coil again

Discussion in 'Technical' started by x72COMETx, May 14, 2014.

  1. x72COMETx

    x72COMETx Member

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    1972 Mercury Comet, 1972 Mercury comet GT, 1975 mercury comet (RIP), 1974 ford maverick (RIP)
    So i wasnt getting spark from cranking the engine with the key but when i use a toggle switch to keep power to the coil i got spark, so i ran a wire from the red/green wire side of the solenoid to the positive side of the coil and i started it with the key and it ran but when i turned it off and tried it again i got no spark. I went and changed my points and condensor and still no spark so it must be my coil. Did this happen because i dont have the resistor hooked up or the wire i ran from the solenoid to coil?
     
  2. MSmithPDX

    MSmithPDX Member

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    If it's the stock coil, yes.

    You need to drop the voltage from the battery 12V to about 8-9V.

    If you want to do this the CORRECT way, you run the red/green wire from the solenoid to a 12V automotive relay (like from radio shack). You wire from 1 side of the relay to a ballast resistor, and from the resistor to the battery. then from the other side of the relay to your Ignition Coil.
     
    Last edited: May 14, 2014
  3. rthomas771

    rthomas771 Member

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    ...or wire it like the factory designed it to work
     
  4. MSmithPDX

    MSmithPDX Member

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    Or, since I don't know if his factory harness is complete, I'm just going to tell him how to do it the way he's doing it, but without burning down his car around his ears.
     

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