Jeep 1997 Grand Cherokee Service Manual page 20

0 - 8 LUBRICATION AND MAINTENANCE
JUMP STARTING, HOISTING AND TOWING
SERVICE PROCEDURES
EMERGENCY TOW HOOKS . . . . . . . . . . . . . . . 10
FOUR-WHEEL-DRIVE VEHICLE TOWING
HOISTING RECOMMENDATIONS
SERVICE PROCEDURES
JUMP STARTING PROCEDURE
WARNING: REVIEW ALL SAFETY PRECAUTIONS
AND WARNINGS IN GROUP 8A, BATTERY/STARTING/
CHARGING SYSTEMS DIAGNOSTICS. DO NOT JUMP
START A FROZEN BATTERY, PERSONAL INJURY CAN
RESULT. DO NOT JUMP START WHEN MAINTENANCE
FREE BATTERY INDICATOR DOT IS YELLOW OR
BRIGHT COLOR. DO NOT JUMP START A VEHICLE
WHEN THE BATTERY FLUID IS BELOW THE TOP OF
LEAD PLATES. DO NOT ALLOW JUMPER CABLE
CLAMPS TO TOUCH EACH OTHER WHEN CON-
NECTED TO A BOOSTER SOURCE. DO NOT USE
OPEN FLAME NEAR BATTERY. REMOVE METALLIC
JEWELRY WORN ON HANDS OR WRISTS TO AVOID
INJURY BY ACCIDENTAL ARCING OF BATTERY CUR-
RENT. WHEN USING A HIGH OUTPUT BOOSTING
DEVICE, DO NOT ALLOW BATTERY VOLTAGE TO
EXCEED 16 VOLTS. REFER TO INSTRUCTIONS PRO-
VIDED WITH DEVICE BEING USED.
CAUTION: When using another vehicle as a
booster, do not allow vehicles to touch. Electrical
systems can be damaged on either vehicle.
TO JUMP START A DISABLED VEHICLE:
(1) Raise hood on disabled vehicle and visually
inspect engine compartment for:
• Battery cable clamp condition, clean if necessary.
• Frozen battery.
• Yellow or bright color test indicator, if equipped.
• Low battery fluid level.
• Generator drive belt condition and tension.
• Fuel fumes or leakage, correct if necessary.
CAUTION: If the cause of starting problem on dis-
abled vehicle is severe, damage to booster vehicle
charging system can result.
(2) When using another vehicle as a booster source,
park the booster vehicle within cable reach. Turn off all
BATTERY NEGATIVE CABLE BATTERY POSITIVE CABLE NEGATIVE JUMPER CABLE POSITIVE JUMPER CABLE
INDEX
page
JUMP STARTING PROCEDURE . . . . . . . . . . . . . 8
TOWING RECOMMENDATIONS . . . . . . . . . . . . . 9
. . . . 10 TWO-WHEEL-DRIVE VEHICLE TOWING . . . . . . 9
. . . . . . . . . . 10
accessories, set the parking brake, place the automatic
transmission in PARK or the manual transmission in
NEUTRAL and turn the ignition OFF.
or neutral and set park brake. Turn off all accesso-
ries.
clamp to positive terminal (+). BLACK clamp to neg-
ative terminal (-). DO NOT allow clamps at opposite
end of cables to touch, electrical arc will result.
Review all warnings in this procedure.
clamp to positive (+) terminal. Connect BLACK
jumper cable clamp to engine ground as close to the
ground cable attaching point as possible (Fig. 1).
booster battery, let the engine idle a few minutes,
then start the engine in the vehicle with the dis-
charged battery.
CAUTION: Do not crank starter motor on disabled
vehicle for more than 15 seconds, starter will over-
heat and could fail.
at least 12.4 volts (75% charge) before attempting to
start engine. If engine does not start within 15 sec-
ENGINE GROUND TEST INDICATOR BATTERY
(3) On disabled vehicle, place gear selector in park
(4) Connect jumper cables to booster battery. RED
(5) On disabled vehicle, connect RED jumper cable
(6) Start the engine in the vehicle which has the
Fig. 1 Jumper Cable Clamp Connections
(7) Allow battery in disabled vehicle to charge to
ZG
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