Battery System - Service Information Jeep Grand Cherokee WK2

DIAGNOSIS AND TESTING - BATTERY SYSTEM

The battery, starting, and charging systems in the vehicle operate with one another and must be tested as a complete system. In order for the engine to start and the battery to maintain its charge properly, all of the components that are used in these systems must perform within specifications. It is important that the battery, starting, and charging systems be thoroughly tested and inspected any time a battery needs to be charged or replaced. The cause of abnormal battery discharge, overcharging or early battery failure must be diagnosed and corrected before a battery is replaced and before a vehicle is returned to service. The service information for these systems has been separated within this service article to make it easier to locate the specific information you are seeking. However, when attempting to diagnose any of these systems, it is important that you keep their interdependency in mind.

The diagnostic procedures used for the battery, starting, and charging systems include the most basic conventional diagnostic methods, to the more sophisticated On-Board Diagnostics (OBD) built into the Powertrain Control Module (PCM). Use of an induction-type milliampere ammeter, a volt/ohmmeter, a battery charger, a carbon pile rheostat (load tester) and a 12-volt test lamp may be required. All OBD-sensed systems are monitored by the PCM. Each monitored circuit is assigned a Diagnostic Trouble Code (DTC). The PCM will store a DTC in electronic memory for any failure it detects. for the proper charging system on-board diagnostic test procedures. Refer to DIAGNOSIS AND TESTING .

GR8 ELECTRICAL SYSTEM TESTER

The Midtronics GR8 battery system tester is designed to help diagnose the cause of a defective battery. for directions on using the Midtronics GR8 battery tester. Refer to BATTERY, AGM , STANDARD PROCEDURE .

The battery Group Size number, the Cold Cranking Amperage (CCA) rating, and the Reserve Capacity (RC) rating or Ampere-Hours (AH) rating can be found on the original equipment battery label. Be certain that a replacement battery has the correct Group Size number, as well as CCA, and RC or AH ratings that equal or exceed the original equipment specification for the vehicle being serviced. Battery sizes and ratings are discussed in more detail below.

1. Group Size - The outside dimensions and terminal placement of the battery conform to standards established by the Battery Council International (BCI). Each battery is assigned a BCI Group Size number to help identify a correctly-sized replacement.
2. Cold Cranking Amperage - The Cold Cranking Amperage (CCA) rating specifies how much current (in amperes) the battery can deliver for thirty seconds at -18° C (0° F). Terminal voltage must not fall below 7.2 volts during or after the thirty second discharge period. The CCA required is generally higher as engine displacement increases, depending also upon the starter current draw requirements.
3. Reserve Capacity - The Reserve Capacity (RC) rating specifies the time (in minutes) it takes for battery terminal voltage to fall below 10.5 volts, at a discharge rate of 25 amperes. RC is determined with the battery fully-charged at 26.7° C (80° F). This rating estimates how long the battery might last after a charging system failure, under minimum electrical load.
4. Ampere-Hours - The Ampere-Hours (AH) rating specifies the current (in amperes) that a battery can deliver steadily for twenty hours, with the voltage in the battery not falling below 10.5 volts. This rating is also sometimes identified as the twenty-hour discharge rating.
5. Load Test Amperage - The Load Test Amperage rating specifies the current (in amperes) that a battery should be tested at with the battery load test equipment. This value should always be 50 percent of the CCA. For example: the CCA for this battery is 730 amps, the Load Test Amperage is 50 percent of that or 365 amps.

TORQUE SPECIFICATIONS

CLEANING

The following information details the recommended cleaning procedures for the battery and related components. In addition to the maintenance schedules found in this service information, it is recommended that these procedures be performed any time the battery or related components must be removed for vehicle service. Refer to MAINTENANCE SCHEDULES , DESCRIPTION .

Scheme 1

Scheme 2

Scheme 3

1. Clean the battery cable terminal clamps (2) of all corrosion. Remove any corrosion using a wire brush or a post and terminal cleaning tool (1), and a sodium bicarbonate (baking soda) and warm water cleaning solution.
2. Clean the battery tray and battery hold down hardware of all corrosion. Remove any corrosion using a wire brush and a sodium bicarbonate (baking soda) and warm water cleaning solution (2). Paint any exposed bare metal.
3. If the removed battery is to be reinstalled, clean the outside of the battery case (3) and the top cover with a sodium bicarbonate (baking soda) and warm water cleaning solution (2) using a stiff bristle parts cleaning brush (1) to remove any acid film. Rinse the battery with clean water. Ensure that the cleaning solution does not enter the battery cells through the vent holes. If the battery is being replaced, confirm that the replacement battery is the correct size and has the correct ratings for the vehicle.
4. Clean the battery thermal guard with a sodium bicarbonate (baking soda) and warm water cleaning solution (2) using a stiff bristle parts cleaning brush (1) to remove any acid film.
5. Clean any corrosion from the battery terminal posts with a wire brush or a post and terminal cleaner (1) and a sodium bicarbonate (baking soda) and warm water cleaning solution.

INSPECTION

The following information details the recommended inspection procedures for the battery and related components. In addition to the maintenance schedules, , it is recommended that these procedures be performed any time the battery or related components are removed for vehicle service. Refer to MAINTENANCE SCHEDULES , DESCRIPTION .

1. Inspect the battery cable terminal clamps for damage. Replace any battery cable that has a damaged or deformed terminal clamp.
2. Inspect the battery tray and battery hold down hardware for damage. Replace any damaged parts.
3. Slide the thermal guard off of the battery case, if equipped. Inspect the battery case for cracks or other damage that could result in electrolyte leaks. Also, check the battery terminal posts for looseness. Batteries with damaged cases or loose terminal posts must be replaced.
4. Inspect the battery thermal guard for tears, cracks, deformation or other damage. Replace any battery thermal guard that has been damaged.
5. Inspect the battery built-in test indicator sight glass (if equipped) for an indication of the battery condition. If the battery is discharged, charge as required. Refer to «BATTERY, AGM , STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/charging-system/#battery-system-service-information) .

DESCRIPTION

The battery is located under the passenger seat. A breather line runs from the battery through the bottom of the recess well to the outside of the vehicle.

The battery negative cable is attached to the outboard side of the battery compartment.

The AGM battery is located and removed in the same manner as the standard battery for the appropriate starter battery removal procedure. Refer to BATTERY, AGM , REMOVAL .

MIDTRONICS GR8 BATTERY TESTER

The Midtronics GR8 battery tester is designed to help diagnose the cause of an inoperative battery. for instructions on the use of the Midtronics GR8 battery tester. Refer to BATTERY, AGM , STANDARD PROCEDURE .

A battery that will not accept a charge is inoperative, and must be replaced. Further testing is not required. A fully-charged battery must be load tested to determine its cranking capacity. A battery that is fully-charged, but does not pass the load test, is inoperative and must be replaced.

Note. Completely discharged batteries may take several hours to accept a charge. For the proper battery charging procedure, refer to STANDARD PROCEDURE .

ABSORBENT GLASS MAT (AGM) BATTERY CHARGING

Vehicles equipped with the AGM starter battery utilize a unique absorbent glass mat battery design. This battery has a maximum charging voltage that must not be exceeded in order to restore the battery to its full potential, failure to use the following AGM battery charging procedure could result in damage to the battery or personal injury.

Battery charging is the means by which the battery can be restored to its full voltage potential. A battery is fully-charged when

1. Midtronics (special tool #GR8-1220KIT-CHRY, AGM Battery Tester/Charger Station) tester indicates battery is OK.
2. Open-circuit voltage of the battery is 12.65 volts or above.
3. Battery passes Load Test multiple times.

After the battery has been charged to 12.6 volts or greater, perform a load test to determine the battery cranking capacity. If the battery passes a load test, return the battery to service. If the battery fails a load test, it is faulty and must be replaced.

Clean and inspect the battery hold downs, well, terminals, posts, and top before completing battery service. For the proper battery system cleaning procedures, refer to CLEANING and INSPECTION .

CHARGING A COMPLETELY DISCHARGED BATTERY

The following procedure should be used to recharge a completely discharged battery. Unless this procedure is properly followed, a good battery may be needlessly replaced.

1. Measure the voltage at the battery posts with a voltmeter, accurate to 1/10 (0.10) volt. For access instructions, refer to «REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/charging-system/#battery-system-service-information) and «INSTALLATION»(/jeep/grand-cherokee/wk2-2010-2013/remont/charging-system/#battery-system-service-information__installation) . If the reading is below ten volts, the battery charging current will be low. It could take several hours before the battery accepts a current greater than a few milliamperes. Such low current may not be detectable on the ammeters built into many battery chargers.
2. Disconnect and isolate the battery negative cable. Connect the Midtronics (special tool #GR8-1220KIT-CHRY, AGM Battery Tester/Charger Station). NOTE: Some battery chargers are equipped with polarity-sensing circuitry. This circuitry protects the battery charger and the battery from being damaged if they are improperly connected. If the battery state-of-charge is too low for the polarity-sensing circuitry to detect, the battery charger will not operate. This makes it appear that the battery will not accept charging current. Refer to the instructions provided by the manufacturer of the battery charger for details on how to bypass the polarity-sensing circuitry.
3. Battery chargers vary in the amount of voltage and current they provide. The amount of time required for a battery to accept measurable charging current at various voltages is shown in the Charge Rate Table. If the charging current is still not measurable at the end of the charging time, the battery is faulty and must be replaced. If the charging current is measurable during the charging time, the battery may be good and the charging should be completed in the normal manner.

BATTERY CHARGE RATE TABLE

CHARGING TIME REQUIRED

The time required to charge a battery will vary, depending upon the following factors

1. Battery Capacity - A completely discharged heavy-duty battery requires twice the charging time of a small capacity battery.
2. Temperature - A longer time will be needed to charge a battery at -18° C (0° F) than at 27° C (80° F). When a fast battery charger is connected to a cold battery, the current accepted by the battery will be very low at first. As the battery warms, it will accept a higher charging current rate (amperage).
3. Charger Capacity - A battery charger that supplies only five amperes will require a longer charging time. A battery charger that supplies eight amperes will require a shorter charging time.
4. State-Of-Charge - A completely discharged battery requires more charging time than a partially discharged battery. Electrolyte is nearly pure water in a completely discharged battery. At first, the charging current (amperage) will be low. As the battery charges, the specific gravity of the electrolyte will gradually rise.

The Battery Charging Time Table gives an indication of the time required to charge a typical battery at room temperature based upon the battery state-of-charge and the charger capacity.

BATTERY CHARGING TIME TABLE

IGNITION-OFF DRAW TEST

The term Ignition-Off Draw (IOD) identifies a normal condition where power is being drained from the battery with the ignition switch in the Off position. A normal vehicle electrical system will draw from five to thirty-five milliamperes (0.005 to 0.035 ampere) with the ignition switch in the Off position, and all non-ignition controlled circuits in proper working order. Up to thirty-five milliamperes are needed to enable the memory functions for the Powertrain Control Module (PCM), digital clock, electronically tuned radio, and other modules which may vary with the vehicle equipment.

A vehicle that has not been operated for approximately twenty days, may discharge the battery to an inadequate level. When a vehicle will not be used for twenty days or more (stored), remove the IOD fuse from the Junction Block (JB). This will reduce battery discharging.

Excessive IOD can be caused by

1. Electrical items left on.
2. Inoperative or improperly adjusted switches.
3. Inoperative or shorted electronic modules and components.
4. An internally shorted generator.
5. Intermittent shorts in the wiring.

If the IOD is over thirty-five milliamperes, the problem must be found and corrected before replacing a battery. In most cases, the battery can be charged and returned to service after the excessive IOD condition has been corrected.

1. Verify that all electrical accessories are off. Turn off all lamps, remove the ignition key, and close all doors. If the vehicle is equipped with an illuminated entry system or an electronically tuned radio, allow the electronic timer function of these systems to automatically shut off (time out). This may take up to ten minutes. Refer to the Electronic Module Ignition-Off Draw Table for more information. ELECTRONIC MODULE IGNITION-OFF DRAW (IOD) TABLE Module Time Out? (If Yes, Interval And Wake-Up Input) IOD IOD After Time Out Radio No 1 to 3 milliamperes N/A Audio Power Amplifier No up to 1 milliampere N/A Powertrain Control Module (PCM) No 0.95 milliampere N/A Cabin Compartment Node (CCN) No 0.44 milliampere N/A
2. Determine that the underhood lamp is operating properly, then disconnect the lamp wire harness connector or remove the lamp bulb.
3. Turn off all electrical accessories.
4. Disconnect the battery negative cable. CAUTION: Do not open any doors, or turn on any electrical accessories with the lowest milliampere scale selected, or the multi-meter may be damaged.
5. Connect a 10 amp fused jumper wire between the negative battery cable and the negative battery post.
6. Turn the ignition key ON and then OFF and wait 10 minutes for all systems to enter sleep mode. NOTE: Do not break the connection between the 10 amp fused jumper wire and the battery. If the connection between the battery negative terminal post and the negative cable terminal clamp is lost during any part of the IOD test, the electronic timer function will be activated and all of the tests will have to be repeated.
7. Set an electronic digital multi-meter to its highest amperage scale. Connect the multi-meter to the battery negative cable terminal clamp and the battery negative terminal post, but not on the jumper connection.
8. Remove the 10 amp jumper wire without breaking the digital multi-meter connection.
9. The multi-meter leads must be securely clamped to the battery negative cable terminal clamp and the battery negative terminal post, but not the 10 amp jumper wire.
10. The high-amperage IOD reading on the multi-meter should be very low or nonexistent, depending upon the electrical equipment in the vehicle. If the amperage reading remains high, remove and replace each fuse or circuit breaker in the TIPM, one at a time until the amperage reading becomes very low, or nonexistent. Refer to the appropriate wiring information for complete TIPM, circuit breaker, and circuit identification. This will isolate each circuit and identify the circuit that is the source of the high-amperage IOD. If the amperage reading remains high after removing and replacing each fuse, disconnect the wire harness from the generator. If the amperage reading now becomes very low or nonexistent, diagnose and repair the Charging System as necessary. After the high-amperage IOD has been corrected, switch the multi-meter to progressively lower amperage scales and, if necessary, repeat the fuse and circuit breaker remove-and-replace process to identify and correct all sources of excessive IOD. It is now safe to select the lowest milliampere scale of the multi-meter to check the low-amperage IOD.
11. Observe the multi-meter reading. The low-amperage IOD should not exceed thirty-five milliamperes (0.035 ampere). If the current draw exceeds thirty-five milliamperes, isolate each circuit using the fuse and circuit breaker remove-and-replace process in step #10. The multi-meter reading will drop to within the acceptable limit when the source of the excessive current draw is disconnected. Repair this circuit as required, whether a wiring short, incorrect switch adjustment, or an inoperative component is the cause.

OPEN-CIRCUIT VOLTAGE TEST

A battery open-circuit voltage (no load) test will show the approximate state-of-charge of a battery.

Before proceeding with this test, completely charge the battery. Refer to STANDARD PROCEDURE .

1. Before measuring the open-circuit voltage, the surface charge must be removed from the battery. Turn on the headlamps for fifteen seconds, then allow up to five minutes for the battery voltage to stabilize.
2. Disconnect and isolate both battery cables, negative cable first.
3. Using a voltmeter connected to the battery posts (see the instructions provided by the manufacturer of the voltmeter), measure the open-circuit voltage.

Refer to the Open-Circuit Voltage Table. This voltage reading will indicate the battery state-of-charge, but will not reveal its cranking capacity. If a battery has an open-circuit voltage reading of 12.4 volts or greater, it may be load tested to reveal its cranking capacity.

GR8 BATTERY TESTER / CHARGER

Always use the Midtronics GR8 Instruction Manual that was supplied with the tester as a reference. If the Instruction Manual is not available the following procedure can be used

BATTERY TESTING

1. If testing the battery OUT-OF-VEHICLE, clean the battery terminals with a wire brush before testing. Refer to «CLEANING»(/jeep/grand-cherokee/wk2-2010-2013/remont/charging-system/#battery-system-service-information__cleaning) . If the battery is equipped with side post terminals, install and tighten the supplied lead terminal stud adapters. Do not use steel bolts. Failure to properly install the stud adapters, or using stud adapters that are dirty or worn-out may result in false test readings.
2. If testing the battery IN-THE-VEHICLE, make certain all of the vehicle accessory loads are OFF, including the ignition. Connect the Midtronics GR8 directly to the battery posts. NOTE: Multiple batteries connected in parallel must have the ground cable disconnected to perform a battery test. Failure to disconnect may result in false battery test readings.
3. Using the ARROW key select in or out of vehicle testing and press ENTER to make a selection.
4. If not selected, choose the Cold Cranking Amp (CCA) battery rating. Or select the appropriate battery rating for your area (see menu). The tester will then run its self programmed test of the battery and display the results. Refer to the test result table noted below.
5. While viewing the battery test result, press the CODE button and the tester will prompt you for the last 4 digits of the VIN. Use the UP/DOWN arrow buttons to scroll to the correct character; then press ENTER to select and move to the next digit. Then press the ENTER button to view the SERVICE CODE. Pressing the CODE button a second time will return you to the test results.

Note. The SERVICE CODE is required on every warranty claim submitted for battery replacement.

QUICK REFERENCE GUIDE

Inspect the battery for damages and check the electrolyte level. Always use the necessary safety precautions when working with batteries to prevent severe injury or death. Follow all manufacturers' instructions and BCI (Battery Council International) safety recommendations, which include the following precautions

MAIN MENU

The Main Menu is the starting point for all tools and utilities, which are depicted as icons. Some icons lead directly to the function they represent, while others are menu icons that lead to two or more options.

Scheme 4

Automatically tests, charges, and provides battery decision using the information you select in a series of screens. Start here to generate warranty codes.

Scheme 5

Tests the starting and charging systems.

Scheme 6

Maintains battery voltage at 13.5 volts to provide uninterrupted reprogramming of ECUs and retain vehicle system settings.

Scheme 7

Includes a utility to view and print a test counter, a data transfer utility, the software version and date, the Midtronics GR8 serial number for the control module, and current wireless channel.

Scheme 8

The Setup Menu lets you customize options in the Midtronics GR8 to suit your needs.

Scheme 9

Provides a list of topics and definitions. Also includes Midtronics Customer Service phone numbers.

Scheme 10

Automatically tests and charges battery, starting, and charging system. Generates a warranty code for Replace and Bad Cell decisions.

Scheme 11

Pre Delivery Inspection (PDI): For testing delivered vehicles and lot maintenance. Uses the same inputs as a diagnostic charge.

Scheme 12

Dual Battery Charge mode allows the charger to be used with dual battery systems.

Scheme 13

Makes high output current available to boost charge an in-vehicle battery and assist in starting the engine.

Scheme 14

Provides a timed charge that ranges from 5 to 120 minutes or a continuous charge that ends when you press the STOP key.

Scheme 15

In this mode the charger can provide a trickle charge for long term, low amp battery charging.

Scheme 16

Generates 15-digit warranty codes for physically defective batteries or customer good will.

Scheme 17

1. Control module: Backlit graphical display and keypad for data entry.
2. ON/OFF switch: ON/OFF switch Turns power on and off to the GR8.
3. STATUS light: Lights in conjunction with beeping alarm to indicate transitions and warnings.
4. Data card slot: For future upgrades via a data card. The slot contains a plastic filler card for protection.

Scheme 18

1. Battery Decisions
2. Select Rating
3. Measured capacity
4. Measured voltage
5. Good Range NOTE: The warranty code screen will only be displayed for REPLACE BATTERY and BAD CELL-REPLACE decisions.
6. Enter this number into wiTech
7. Replace range
8. Replaced AMP Hours
9. Charging Time

TEST RESULTS-CHARGING SYSTEM

A REPLACE BATTERY or BAD CELL-REPLACE decision gives you the option of generating a warranty code. For Chrysler vehicles model year 2011 or later, enter that warranty code into your wiTECH in the Midtronics warranty code validation routine.

Scheme 19

1. Loads-off current at rev if amp clamp is used
2. Loads-off DC voltage at rev
3. Decision
4. Loads-on DC voltage at rev
5. Loads-on current at rev if amp clamp is used
6. Bar graph of DC voltage within normal range (loads on and off)
7. Graph of diode waveform
8. Peak-to-peak AC voltage
9. Normal DC voltage range

Scheme 20

1. Average cranking voltage
2. Average cranking current if amp clamp is used
3. Cranking time in seconds
4. Y axis = System performance: cranking voltage

Scheme 21

Scheme 22

Scheme 23

Scheme 24

1. If equipped with power seats, move the seat to the most forward and upright position.
2. If equipped with manual seats, move the seat to the most forward position.
3. Turn the ignition switch to the Off position. Be certain that all electrical accessories are turned off.
4. Remove the battery cover (1). NOTE: Negative battery terminal shown in illustration, positive terminal similar.
5. Remove the negative battery cable (1) from the battery.
6. Disconnect the positive battery cable and position aside.
7. Remove the battery thermal blanket.
8. Remove the battery hold down retainers (2) and remove the battery hold down (1). WARNING: Wear a suitable pair of rubber gloves when removing a battery by hand. Safety glasses should also be worn. If the battery is cracked or leaking, the electrolyte can burn the skin and eyes.
9. Remove the battery from the vehicle.

INSTALLATION

1. Install the battery into the vehicle.
2. Install the battery hold down (1) into position and install the battery hold down retainers (2). Tighten to 20 N.m (15 Ft. Lbs.).
3. Install the battery thermal blanket. NOTE: Negative battery terminal shown in illustration, positive terminal similar.
4. Position back the positive battery cable (2) and connect to the battery (1).
5. Position back the negative battery cable and connect to the battery.
6. Install the battery cover (1).
7. Move the seat back to its original position.

BATTERY CABLES

A voltage drop test will determine if there is excessive resistance in the battery cable terminal connections or the battery cables. If excessive resistance is found in the battery cable connections, the connection point should be disassembled, cleaned of all corrosion or foreign material, then reassembled. Following reassembly, check the voltage drop for the battery cable connection and the battery cable again to confirm repair.

When performing the voltage drop test, it is important to remember that the voltage drop is giving an indication of the resistance between the two points at which the voltmeter probes are attached. EXAMPLE: When testing the resistance of the battery positive cable, touch the voltmeter leads to the battery positive cable terminal clamp and to the battery positive cable eyelet terminal at the starter solenoid B(+) terminal stud. If you probe the battery positive terminal post and the battery positive cable eyelet terminal at the starter solenoid B(+) terminal stud, you are reading the combined voltage drop in the battery positive cable terminal clamp-to-terminal post connection and the battery positive cable.

VOLTAGE DROP TEST

The following operation will require a voltmeter accurate to 1/10 (0.10) volt. Before performing this test, be certain that the following procedures are accomplished

1. The battery is fully-charged and tested. Refer to «BATTERY, AGM , STANDARD PROCEDURE»(/jeep/grand-cherokee/wk2-2010-2013/remont/charging-system/#battery-system-service-information) .
2. Fully engage the parking brake.
3. If the vehicle is equipped with an automatic transmission, place the gearshift selector lever in the Park position. If the vehicle is equipped with a manual transmission, place the gearshift selector lever in the Neutral position and block the clutch pedal in the fully depressed position.
4. Verify that all lamps and accessories are turned off.
5. To prevent a gasoline engine from starting, remove the Automatic ShutDown (ASD) relay. The ASD relay is located in the Integrated Power Module (IPM), in the engine compartment. Refer to the fuse and relay layout label on the underside of the IPM cover for ASD relay identification and location.

Scheme 25

Scheme 26

Scheme 27

Scheme 28

1. Connect the positive lead of the voltmeter (1) to the battery negative terminal post. Connect the negative lead of the voltmeter (1) to the battery negative cable terminal clamp. Rotate and hold the ignition switch in the Start position. Observe the voltmeter. If voltage is detected, correct the poor connection between the battery negative cable terminal clamp and the battery negative terminal post.
2. Connect the positive lead of the voltmeter (1) to the battery positive terminal post. Connect the negative lead of the voltmeter to the battery positive cable terminal clamp. Rotate and hold the ignition switch in the Start position. Observe the voltmeter. If voltage is detected, correct the poor connection between the battery positive cable terminal clamp and the battery positive terminal post.
3. Connect the voltmeter (2) to measure between the battery positive cable terminal clamp (1) and the starter solenoid (3) B(+) terminal stud. Rotate and hold the ignition switch in the Start position. Observe the voltmeter. If the reading is above 0.2 volt, clean and tighten the battery positive cable eyelet terminal connection at the starter solenoid B(+) terminal stud. Repeat the test. If the reading is still above 0.2 volt, replace the faulty battery positive cable.
4. Connect the voltmeter (1) to measure between the battery (2) negative cable terminal clamp and a good clean ground (3) on the engine block. Rotate and hold the ignition switch in the Start position. Observe the voltmeter. If the reading is above 0.2 volt, clean and tighten the battery negative cable eyelet terminal connection to the engine block. Repeat the test. If the reading is still above 0.2 volt, replace the faulty battery negative cable.

Scheme 29

1. Turn the ignition switch to the Off position. Be certain that all electrical accessories are turned off.
2. Position the passenger front seat forward.
3. Remove the battery cover (1). NOTE: Shown in illustration with seat removed for clarity.
4. Disconnect the negative the negative battery cable.
5. Remove the negative battery cable (1) retainer to body (3).
6. Remove the negative battery cable.

Scheme 30

Scheme 31

Scheme 32

Scheme 33

Scheme 34

Scheme 35

1. Remove the front passenger seat. Refer to «SEAT, FRONT , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/gauges-instrument-panels/#body-interior-exterior) .
2. Remove the battery cover (1).
3. Disconnect the negative and positive battery cables. NOTE: Driver's side shown in illustration, passenger side similar.
4. Remove the passenger side scuff plate. Refer to «PLATE, SCUFF, DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/gauges-instrument-panels/#body-interior-exterior) .
5. Remove the passenger side cowl trim panel. Refer to «PANEL, COWL TRIM, SIDE , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/gauges-instrument-panels/#body-interior-exterior) .
6. Remove the glovebox. Refer to «GLOVE BOX, INSTRUMENT PANEL , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/gauges-instrument-panels/#body-interior-exterior) .
7. Remove the glovebox liner.
8. Remove the retainer (1) from the positive battery cable junction block.
9. Push the positive battery cable (2) through the dash panel (3).
10. Remove the positive battery (1) cable from the vehicle (2).

NEGATIVE BATTERY

Note. Shown in illustration with seat removed for clarity.

1. Install the negative battery cable.
2. Install the negative battery cable (1) retainer to body (3).
3. Connect the negative the negative battery cable.
4. Install the battery cover (1).
5. Position back the passenger front seat.

POSITIVE BATTERY

1. Install the positive battery (1) cable into the vehicle (2).
2. Push the positive battery cable (2) through the dash panel (3).
3. Install the retainer (1) from the positive battery cable junction block.
4. Install the glovebox liner.
5. Install the glovebox. Refer to «INSTALLATION»(/jeep/grand-cherokee/wk2-2010-2013/remont/gauges-instrument-panels/#body-interior-exterior) .
6. Install the passenger side cowl trim panel. Refer to «PANEL, COWL TRIM, SIDE , INSTALLATION»(/jeep/grand-cherokee/wk2-2010-2013/remont/gauges-instrument-panels/#body-interior-exterior) .
7. Install the nut that secures the passenger side cowl trim panel to the mounting bracket.
8. Install the passenger side hush panel from underneath the instrument panel. NOTE: Driver's side shown in illustration, passenger side similar.
9. Install the passenger side scuff plate. Refer to «PLATE, SCUFF, DOOR , INSTALLATION»(/jeep/grand-cherokee/wk2-2010-2013/remont/gauges-instrument-panels/#body-interior-exterior) .
10. Install the front passenger seat. Refer to «SEAT, FRONT , INSTALLATION»(/jeep/grand-cherokee/wk2-2010-2013/remont/gauges-instrument-panels/#body-interior-exterior) .
11. Connect the positive batter cable.
12. Install the battery cover (1).
13. Connect the negative and positive battery cable.

See also:
• DIAGNOSIS AND TESTING
• STARTING SYSTEM
• MAINTENANCE SCHEDULES , DESCRIPTION
• SEAT, FRONT , REMOVAL
• BATTERY, AGM , STANDARD PROCEDURE
• CLEANING
• INSPECTION
• INSTALLATION