Posted by John T on September 27, 2009 at 18:03:50 from (66.244.97.31):
In Reply to: Ign coil polarity posted by jimlll on September 27, 2009 at 13:20:43:
Coils are indeed polarity sensitive.....Sure they will still fire at the wrong polarity but the system is more efficient if the polarity is correct........Also note its easier to emit electrons from a relatively hotter (electrode tip) surface to a relatively cooler (ground strap) similar to why theres a heater under the cathode in a vacuum tube.
For Pos ground the coils + goes to ground via the distributor and its points while the - wires to the ignition switch,........Opposite that for neg ground......
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