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How do you test a coil ?

(1990 Jeep Cherokee)
in Columbia, PA on May 10, 2009
I am not getting any spark ! If it is not a coil what can i look at next ?
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Popular Answer
on May 27, 2009
You need to check that the coil is getting the proper signal to fire the plugs.
on November 04, 2010
Pull the plug off of the coil and check for 12V on the B+ side of the plug. If not 12V, I would suspect the Engine Control Module which can be reflashed if you get the whole car to the dealer ( 1hr bill time roughly $100) or else I have been told that it could be the Ignition Switch.
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