Tools Required
J 42000 Battery Tester
Diagnostic Aids
Caution: Refer to Battery Disconnect Caution in the Preface section.
Important:
• The battery test using the
J 42000 Battery Tester requires correct connections to the battery terminals. A failure to obtain the correct connections during the test may result in a failed test on a good battery. • Use the Out of Vehicle test for each battery when testing a vehicle with dual batteries.
Follow these instructions in order to avoid an incorrect diagnosis because of connections:
| • | If testing the vehicle with the battery cables still connected, wiggle the J 42000 clips on the terminal bolt. This may cut through any coating or through any oxidation that may be present on the bolt. |
| Even new bolts contain a protective coating that may insulate or cause a resistance in the test circuit. |
| • | If correct connections to the battery terminal bolts in the vehicle are in doubt, perform the following steps: |
| 1. | Disconnect the negative battery cable. |
| 2. | Disconnect the positive battery cable. |
| 3. | Install the test adapters on the terminals. |
| 4. | Follow the instructions for testing a removed battery. |
| • | If the tester displays a REPLACE BATTERY or BAD CELL-REPLACE result for a battery tested in the vehicle with the battery cables connected, perform the following steps: |
| 1. | Disconnect the negative battery cable. |
| 2. | Disconnect the positive battery cable. |
| 3. | Install the tester adapters. |
| Important: Always write the test code displayed by the tester on the repair order for any warranty purposes. The number is a unique code that describes the test data for a particular battery at a particular time. The test code may occasionally repeat when you retest the same battery. More often, each test will result in a different code. Use the test code from the second, or Out of Vehicle test. |
| 4. | Follow the instructions for testing a removed battery. |
| 5. | Replace the battery only if the second test shows a REPLACE BATTERY or BAD CELL-REPLACE result. |
Use the test code from the second test for any warranty purposes.
| • | Use the correct terminal adapters. |
| Do not use any common bolts or a combination of bolts, of nuts, and of washers as adapters when testing the battery. |
| Use the test adapters that are provided with the J 42000 or GM P/N 12303040 terminal adapters. If the adapters that are provided with the J 42000 require replacement, use GM P/N 12303040. Any other adapter may not contact the correct areas of the battery terminal, causing a resistance that may result in an invalid battery test result. |
Step | Action | Values | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components. | ||||||||||
1 | Inspect the battery for a cracked, broken, or damaged case, which may be indicated by battery acid leakage. Is the battery OK? | -- | Go to Step 2 | Go to Step 15 | ||||||
2 | Compare the cold cranking amperage (CCA), and reserve capacity (RC) and/or amp hour (AH) rating of the battery to the original battery or original equipment (OE) specification. Refer to Battery Usage . Does the battery meet or exceed the specifications? | -- | Go to Step 3 | Go to Step 15 | ||||||
3 |
Does the negative connector rotate? | -- | Go to Step 4 | Go to Step 5 | ||||||
4 | Use a torque wrench in order to verify the torque to loosen the negative battery terminal bolt. Is the torque above the specified value? | 10 N·m (89 lb in) | Go to Step 9 | Go to Step 8 | ||||||
5 | Attempt to rotate the positive battery cable connector clockwise with light finger pressure. Does the positive connector rotate? | -- | Go to Step 7 | Go to Step 6 | ||||||
6 |
Important: Ensure that all of the electrical loads are turned OFF.
Did the tester pass the battery? | -- | Go to Step 14 | Go to Step 8 | ||||||
7 | Use a torque wrench in order to verify the torque to loosen the positive battery terminal bolt. Is the torque above the specified value? | 10 N·m (89 lb in) | Go to Step 10 | Go to Step 8 | ||||||
8 |
Did you complete the repair? | -- | Go to Step 11 | -- | ||||||
9 |
Did you complete the repair? | Go to Step 10 | -- | |||||||
10 |
Did you complete the repair? | -- | Go to Step 11 | -- | ||||||
11 |
Important: Ensure that both battery cables are disconnected and proper adapters are installed in the battery terminals.
Did the tester pass the battery? | -- | Go to Step 12 | Go to Step 15 | ||||||
12 |
Did you complete this action? | Go to Step 13 | -- | |||||||
13 |
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems. Are the cable bolts properly tightened? | 17 N·m (13 lb ft) | Battery OK | -- | ||||||
14 |
Did you complete the replacement? | Battery OK | -- | |||||||
15 | Replace the battery. Refer to Battery Replacement . Did you complete the replacement? | -- | Battery OK | -- | ||||||
