Service manual

6-18 Engine Electrical Engine
2006 LSSV Service Manual Supplement
Caution: Using an open flame near a battery can
cause battery gas to explode. People have been
hurt doing this, and some have been blinded. Use a
flashlight if you need more light.
Be sure the batteries have enough water. You do
not need to add water to the Optima battery (or
batteries) installed in the vehicle. But if a battery
has filler caps, be sure the right amount of fluid is
there. If it is low, add water to take care of that first.
If you do not, explosive gas could be present.
Battery fluid contains acid that can burn you. Do
not get it on you. If you accidentally get it in your
eyes or on your skin, flush the place with water and
get medical help immediately.
Caution: Keep hands, tools, and clothing away from
the electric engine coolant fans in order to help
prevent personal injury. These fans are electric and
can turn on whether or not the engine is running.
The fans can start automatically with the ignition in
the ON position.
4. Connect the slave cable to the vehicle with the
dead battery.
5. Start the vehicle with the good batteries.
6. Connect the slave cable to the vehicle with the
good battery.
Important: It may take up to 30 minutes to charge the
battery enough to start the vehicle depending on its
state of charge.
7. Allow the vehicle with the dead battery to
charge for 10 minutes.
8. Start the vehicle with the dead battery.
Important: Never remove the cables with the starter
engaged.
9. Remove the slave cable in the reverse order
that it was installed. Take care not to let the
cables touch a metal surface.
10. Reinstall the slave start covers.
24V Generator Noise Diagnosis
Diagnostic Aids
Noise from a generator may be due to electrical or
mechanical noise. Electrical noise, or magnetic whine
usually varies with the electrical load placed on the
generator and is a normal operating characteristic of all
generators. When diagnosing a noisy generator, it is
important to remember that loose or misaligned
components around the generator may transmit the
noise into the passenger compartment and that
replacing the generator may not solve the problem.
24V Generator Noise Diagnosis
Step Action Yes No
1
Test the generator for proper operation using the generator
tester. Refer to Charging System Test in Engine Electrical in
2006 C/K Truck Service Manual.
Is the generator operating properly? Go to Step 2 Go to Step 10