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Home >> Audi >> 2007 >> A4 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 22 (Generators & Regulators) >> On-Vehicle Testing >> No Load Test

No Load Test

WARNING: This page is about a different car, the 2004 Audi S4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Battery cell caps must be screwed in tightly when charging, measuring voltage or performing load tests.
NOTE: If no load voltage is to be measured with battery installed in vehicle, first disconnect ground strap. Vehicle must not be started or driven with tested battery for at least 2 hours before taking measurements. During this time, DO NOT allow load or additional charge to be applied to battery.

With battery installed and ignition switched off, check voltage between battery terminals with voltmeter. If no load voltage is 12.7 volts, or higher, battery is okay. If no load voltage is lower than 12.7, recharge battery, and repeat procedure. If battery voltage is still less than 12.7 after charging battery, replace battery.

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