Troubleshooting - Innova 3551 Manual Del Propietário

If the timing light fails to operate or operates
erratically, make the following checks:
1. Make sure the battery clips are firmly
connected to the battery terminals.
2. Make sure the battery clip polarity is
correct (red battery clip is connected to
the positive (+) battery terminal, black
battery clip is connected to the negative
(–) battery terminal).
3. Make sure the upper and lower ferrite
cores of the inductive pickup clip are
clean. If necessary, clean the inductive
pickup clip as described in MAIN-
TENANCE.
4. Make sure the inductive pickup clip is
properly connected to the No. 1 spark plug
cable.
5. Make sure the No. 1 spark plug is working
properly:

Troubleshooting

■
Connect the inductive pickup clip to
another spark plug cable, and press
the On/Off switch.
■
If the timing light flashes, service the
No. 1 spark plug before continuing.
NOTE
Low spark plug voltage or a faulty spark plug
wire may cause the Timing Light to operate
erratically. Try moving the inductive pickup
clip to a new location on the plug wire to
improve operation.
Some ignition systems and/or specialty spark
plug wires (solid core wires, racing wires, off-
road wires) radiate above normal Electro-
Magnetic Interference (EMI) and Radio
Frequency Interference (RFI) which can
cause improper operation of testing
equipment. Contact the manufacturers of
these parts for instructions on how to use an
inductive pickup with their systems.
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