Mallory Ignition Mallory UNILITE DISTRIBUTOR 576 - Manual (Page 3)

With the Module wired to the coil like it’s ready to
run. Take the cap off and position the Module so
you can see it. Turn the key on, test voltage on the
negative side of the coil, which is where the green
wire attaches to the coil.
To do this the Red lead from the voltmeter will go to
the Green wire on the coil. The Black wire from the
voltmeter will go to ground. Set the voltmeter for
12 volts DC.
With the ignition switch ON you should have about
12 volts. Then take a card or match book and place it
in slot of the module to block the photo optics of the
module. (See Pictures) The voltage should drop to
1-2 volts. Remember it’s an infrared LED you won’t
see it.
If the test results are as follows the Module will need
to be replaced:
(a) Voltage does not drop to 1-2 volts when
optics blocked.
(b) Voltage always stays below 2 volts, blocked
or not.
(c) Voltage only drops above 2 volts, the higher
above 2 volts the weaker the spark.
Possible causes are:
• Faulty charging system: stuck or shorted
regulator, bad ground, dead cell or defective
battery, defective stator or generator.
• Faulty ignition switch, direct shorts in
electrical system.
• Faulty starting system: starter drag.
• Trying to start motor with battery charger
hooked up.
• Non-suppression spark plug wires (copper
or stainless solid core wires). Spark plug wires
must be Spiral Core or Graphite Core
suppression wire.
• Welding on the Bike with Module still hooked
up (unplug the white connector to the Module
before welding).
• Improper coil, use 2-4 ohm coil
(check installation instruction).
If you must replace the Module, replace it
with Mallory Part # A605.
If after completing the test you still have
questions 216-688-8300 ext. 5
TEST PROCEDURE FOR
UNILITE
® AND E-SPARK ®
FOR MOTORCYCLES