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ELECTRICAL
7.9
IGNITION SYSTEM TESTING
Whenever troubleshooting an electrical problem you should first check all terminal connections to be sure they
are clean and tight. Also be sure that colors match when wires are connected
. Use the following pages as a guide
for troubleshooting. The resistance values are also given on the specification pages.
Condition: No Spark or intermittent spark
Disconnect the black wire at the CDI module to
isolate the ignition from the kill system. Verify the
CDI has a good ground (brown) for operation.
Does it have spark?
-Test the ignition switch, engine stop
switch, and speed limiter circuit for
short to ground.
-Check connectors for moisture,
wire color matching or corrosion.
Disconnect the pulse (trigger) coil connector from
the CDI module. Measure the resistance of the
trigger coil . Check reverse signal coil. Refer to the
exploded view on Page 7.8 or the wiring schemat-
ic for meter connections and specifications.
Compare results to the specifications.
Is it within specification?
Inspect connectors, wiring and
grounds to the component in ques-
tion. Replace the component if a
wiring problem cannot be found.
Yes
No
Yes
Yes
No
Check coil ground connection between engine and coil
mount using an ohmmeter. The coil mount should
have good continuity to ground on the engine (0-.2 :.
Verify 12 Volt DC power is present on the red wire to CDI . Replace Spark Plug.
Disconnect and check the secondary coil. Resis-
tance values should be:
Primary Side
- Primary Wire Tab to Ground
(on coil mount or engine): .3 to .5 Ohms
Secondary Side
High Tension Wire to engine
ground- Cap installed - 11,300:
Cap removed - 6300:
Are these values within specs?
Replace the ignition coil.
No
Yes
If all of the above tests are within specifications, and all grounds, connections, and wire color coding
have been inspected, perform voltage output tests on following page or replace the CDI module.
Clean coil mounting area.
Repair ground wire connections.
No
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