ELECTRICAL
10.2
SPECIAL TOOLS
PART NUMBER
TOOL
DESCRIPTION
PV--43568
Fluke
t
77 Digital
Multimeter
2870836
Battery
Hydrometer
2870630
Timing Light
8712100 or 8712500
Tachometer
ELECTRICAL SERVICE
NOTES
Keep the following notes in mind when diagnosing an
electrical problem.
G
Refer to wiring diagram for stator and
electrical
component
resistance
specifications.
G
When
measuring
resistance
of
a
component that has a low resistance
value (under10 Ohms), remember to
subtract meter lead resistance from
the reading.
Connect the leads
together and record the resistance.
The resistance of the component is
equal to tested value minus the lead
resistance.
G
Become familiar with the operation of
your meter. Be sure leads are in the
proper
jack
for the test being
performed (i.e. 10A jack for current
readings).
Refer to the Owner’s
manual included with your meter for
more information.
G
Voltage, amperage, and resistance
values included in this manual are
obtained with a Fluke
t
77 Digital
Multimeter
(PV--43568).
This
meter is acceptable for use when
diagnosing
electrical
problems.
Readings
obtained
with
other
meters may differ.
G
Pay attention to the prefix on the
multimeter reading (K, M, etc.) and
the position of the decimal point.
G
For resistance readings, isolate the
component to be tested. Disconnect
it from the wiring harness or power
supply.
TIMING CHECK PROCEDURE
1.
The ignition timing check hole is in the starter
recoil/magneto housing. Remove the check plug.
NOTE: The ignition timing marks are stamped on the
outside of the flywheel.
Ignition timing must be
inspected with the engine at room temperature (68
°
F
/ 20
°
C).
2.
With the transmission in neutral, start the engine
and set engine speed to 5000 +/- 200 RPM.
3.
Direct the timing light at the ignition timing check
hole and check the ignition timing. NOTE: Do not
allow the engine to warm up. The timing will retard
approximately 2
°
when the engine is warm.
Flywheel
Rotation
32
Timing
Pointer
30
°±
2
°
BTDC@5000RPM
28
Stator Adjustment
Stator Adjustment
If the ignition timing is not within the specified range,
adjust the stator plate position as described below.
1.
Remove the magneto housing.
2.
Remove the flywheel.
3.
Loosen the stator plate screws and adjust the
stator plate position. NOTE: Moving the stator
plate clockwise retards (delays) the ignition
timing.
Moving the plate counterclockwise
advances it.
Advance
Retard
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Summary of Contents for 2009 Trail Blazer 330
Page 94: ...ENGINE 3 48 NOTES P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 110: ...FUEL SYSTEM CARBURETION 4 16 NOTES P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 124: ...BODY STEERING SUSPENSION 5 14 NOTES P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 196: ...ELECTRICAL 10 4 REVERSE LIMIT SYSTEM P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 226: ...ELECTRICAL 10 34 NOTES P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 227: ...ELECTRICAL WIRING DIAGRAM 2009 TRAIL BOSS P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 228: ...ELECTRICAL WIRING DIAGRAM 2009 TRAIL BOSS P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 229: ...ELECTRICAL WIRING DIAGRAM 2009 TRAIL BLAZER P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 230: ...ELECTRICAL WIRING DIAGRAM 2009 TRAIL BLAZER P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...