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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1040 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> Battery Inspection/Test >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
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.
    • If there is any apparent damage, replace the battery.
  2. Verify 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 .
    • If the battery does not meet or exceed specifications, replace the battery.
  3. Verify that the battery cables are clean and tight. The battery terminal bolts should be torqued as specified in Fastener Tightening Specifications .
    • If the battery cable(s) need to be cleaned, clean as required and tighten as specified.
    • If the battery cable(s) are damaged, replace then tighten as specified.
  4. Install the J 42000  and follow directions supplied by the tester. See Special Tools .
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