Harbor Freight Tools 40963 Product manual
Specications
Power Input 12 VDC
Bulb AGA0314TSC Xenon
Lead Length 4 FT.
Timing Advance 0° to 60° in 2° Increments
Important Safety Information
1. Work area safety
a. Keep work area clean and well lit.
Cluttered or dark areas
invite accidents.
b. Keep children and bystanders
away while operating a
diagnostic tool. Distractions can
cause you to lose control.
2. Electrical safety
a. Do not expose diagnostic
tools to rain or wet conditions.
Water entering a diagnostic tool will
increase the risk of electric shock.
b. Do not abuse the cords.
Never use the cords for carrying,
pulling or unplugging the diagnostic
tool. Keep cords away from heat,
oil, sharp edges or moving parts.
Damaged or entangled cords
increase the risk of electric shock.
3. Personal safety
a. Stay alert, watch what you are
doing and use common sense
when operating a diagnostic tool.
Do not use a diagnostic tool while
you are tired or under the inuence
of drugs, alcohol or medication.
A moment of inattention while
operating diagnostic tools may
result in serious personal injury.
b. Use safety equipment.
Always wear eye protection.
Safety equipment such as
dust mask, non-skid safety shoes,
hard hat, or hearing protection
used for appropriate conditions
will reduce personal injuries.
c. Avoid accidental starting.
Ensure the switch is in the
off-position before plugging in.
Carrying diagnostic tools with the
nger on the switch or plugging
in diagnostic tools that have the
switch on invites accidents.
d. Do not overreach. Keep proper
footing and balance at all times.
This enables better control
of the diagnostic tool in
unexpected situations.
e. Dress properly. Do not wear
loose clothing or jewelry.
Keep hair, clothing and gloves
away from moving parts.
Loose clothes, jewelry or long hair
can be caught in moving parts.
Page 2 For technical questions, please call 1-800-444-3353. Item 40963
4. Diagnostic tool use and care
a. Do not force the diagnostic tool.
Use the correct diagnostic tool
for the application. The correct
diagnostic tool will do the job
better and safer at the rate
for which it was designed.
b. Do not use the diagnostic tool if the
trigger does not turn it on and off.
Any diagnostic tool that cannot
be controlled with the trigger is
dangerous and must be repaired.
c. Store idle diagnostic tools out of
the reach of children and do not
allow persons unfamiliar with the
diagnostic tool or these instructions
to operate the diagnostic tool.
Diagnostic tools are dangerous
in the hands of untrained users.
d. Maintain diagnostic tools.
Check for misalignment or binding
of moving parts, breakage of parts
and any other condition that may
affect the diagnostic tool’s operation.
If damaged, have the diagnostic
tool repaired before use.
Many accidents are caused by
poorly maintained diagnostic tools.
e. Use the diagnostic tool and
accessories, in accordance with
these instructions and in the
manner intended for the particular
type of diagnostic tool, taking into
account the working conditions and
the work to be performed. Use of
the diagnostic tool for operations
different from those intended could
result in a hazardous situation.
5. Service
a. Have the diagnostic tool serviced
by a qualied repair person using
only identical replacement parts.
This will ensure that the safety of
the diagnostic tool is maintained.
Specic Safety Rules
1. Maintain labels and nameplates
on the tool. These carry important
safety information. If unreadable or
missing, contact Harbor Freight Tools
for a replacement.
2. Avoid unintentional starting. Prepare to
begin work before connecting the tool.
3. This product is not a toy.
Keep it out of reach of children.
4. People with pacemakers should
consult their physician(s) before use.
Electromagnetic elds in close
proximity to heart pacemaker could
cause pacemaker interference or
pacemaker failure.
Caution is necessary when near coil,
spark plug cables, or distributor of
running engine. Engine should be
off during distributor adjustment.
5. WARNING: Handling the cord
on this product will expose you
to lead, a chemical known to
the State of California to cause
cancer, and birth defects or other
reproductive harm. Wash hands
after handling. (California Health &
Safety Code § 25249.5, et seq).
SAVE THESE INSTRUCTIONS.
Page 3For technical questions, please call 1-800-444-3353.Item 40963
Operation Tips
Timing Light Basics
Automobile engines work by mixing air, fuel
and a spark to ignite the fuel/air mixture,
creating an explosion, that powers the vehicle.
Maximum power from the explosion must be
delivered to the engine at a precise instant.
Attaining that precise instant is called “Timing”.
Timing is essential for fuel economy and power.
Automobile engine manufacturers determine
the exact timing necessary for every engine
they build. Normal engine and ignition
system wear causes the timing to change,
reducing both fuel efciency and power.
Engine manufacturers use two terms when
describing timing, “advanced” and “retarded”.
Timing is advanced when the spark occurs before
the piston reaches the top of a cylinder. Timing
is retarded when the spark occurs after the
piston has started down in the cylinder. Timing
is changed by adjusting the ignition distributor.
To set timing, the engine manufacturer provides
“timing marks” on the engine’s vibration damper.
Read the vehicle’s manual or contact the
manufacturer for the location of timing marks
on the engine. Also, refer to the vehicle service
manual or contact the manufacturer for the
timing specications for the particular engine.
When to Check Timing
The instant that the spark plug res is
determined by the opening of the distributor
ignition breaker points and will change any
time the point gap or dwell angle is changed.
Normal wear on the breaker point rubbing block
will change the dwell and effect the timing.
Most late model vehicles are equipped with
“breakerless electronic ignition systems” and
will not allow a change in timing, because
there are no breaker points. The Timing Light
can still be used to note changes in the timing
caused by problems in the ignition system or
for resetting the timing when components are
changed (i.e. removed and/or replaced).
Figure 1
Page 4 For technical questions, please call 1-800-444-3353. Item 40963
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