TRUCK SERVICE MANUAL
5. On negative ground vehicles, attach one end of the
remaining jumper cable to the negative terminal of the
booster battery and the other end to a ground at least 304
mm (12 inches) from the battery of the vehicle being
started (Figure 9). (DO NOT connect directly to the
negative post of the dead battery.) The ground
connection must provide good electrical conductivity and
current carrying capacity.
On positive ground vehicles, connect jumper cable
between positive (+) terminal of booster battery and
ground on the stalled vehicle.
Take care the clamps from one cable do not
inadvertently touch the clamps on the other cable.
DO NOT lean over the battery when making
Avoid moving, hot or electrical hazards such as
fans, manifolds and spark plug terminals when
6. Be sure everyone is standing away from vehicles. Start
the engine of the vehicle with the booster battery. Wait a
few minutes, then attempt to start the engine of the
vehicle with the discharged battery.
7. Do not operate the starter for more than 15 seconds. Wait
at least 15 seconds between starting attempts to allow
starter motor to cool. If the engine does not start after
several cranking attempts, check for cause of failure to
8. After starting, allow the engine to return to idle speed.
Remove ground cable connection from the vehicle with
discharged battery. Then remove the other end of the
same cable from the booster battery.
9. Remove the other cable by disconnecting from the
discharged battery first and then disconnect the opposite
end from the booster battery.
10. Remove and discard cloths covering battery vents.
A battery test should be performed whenever battery trouble is
Battery testing will determine if:
1. Battery is satisfactory and can remain in service.
2. Battery should be recharged before placing it back in
3. Battery must be replaced.
A complete battery test, as outlined below, will include these
1) Visual Inspection
2) Specific Gravity (Hydrometer) Test
3) Battery Capacity (Load) Test
When performing battery test, observe rules of
safety. Refer to SAFETY PRECAUTIONS.
Always follow instructions of test equipment
STEP 1. VISUAL INSPECTION
a. Visually inspect the outside of the battery for
obvious damage such as cracked or broken case
or cover which would allow electrolyte loss.
Check for terminal damage. If obvious physical
damage is found, replace the battery. If
possible, determine the cause of damage and
b. Check electrolyte level. On maintenance free type
batteries, access to battery cells can be obtained
Side Terminal Batteries:
Use a knife blade to cut through top plaque center
section. (Cut on dotted lines.) Pry up ends of vent
manifold with a screwdriver. Remove manifold by pulling
straight up at the ends (Figure 10). After testing cells,
reinstall manifold by placing it in position and pushing it
down firmly until seated.
Top Terminal Batteries
Use a knife blade to cut through the top plaque center
section on the dotted lines (Figure 11). After removal of
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