Mallory Ignition Mallory HYFIRE VI Series Electronic Ignition Controls 685_6851 - Manual (Page 15)

7. If both of these tests prove out, then the problem is
either in the distributor, crank trigger, or the wiring
is incorrect.
TESTING THE COIL
NOTE: This test should only be done on "stock type"
coils. DO NOT try this test with "CD Only" coils, such
as the Mallory 28880 or ACCEL 140019 and 140010.
This test is also helpful in testing the coil when used
with just a distributor and you are having a "No
Spark" to the plugs condition. When doing this test
you must disconnect the distributor from the coil (-)
terminal, taking it out of the loop and allowing the test
to be done properly.
1. Disconnect the wires coming from the CD box to
the coil (+ and -) terminals and connect the ignition
switch 12 volts wire to the coil (+) terminal of
the coil.
2. Connect a 24" piece of wire to the coil (-) of
the coil.
3. Pull the coil wire out of the distributor cap and get
it to where you can jump a spark to ground with it.
4. Turn the ignition to the "ON" position.
5. Rapidly tap the 24" wire to ground. This will fire the
coil. You should get a 1/4” to 3/8" spark out of the
high voltage coil wire to ground. If you do then the
coil and coil wire are good and working.
6. If no spark to ground, change out the coil wire and
do the test again. If still no spark, the coil is bad
and needs to be replaced.
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