Battery Service

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HEAVY LOAD TEST PROCEDURE

1. Install the load tester as shown in an earlier slide.

2. Load the battery by turning the Load Increase control until the ammeter reads 3 times the amp-hour (AH) rating or one-half the cold-cranking ampere (CCA) rating. 3. Maintain the load for no more than 15 seconds, and note the voltmeter reading.

4. If the voltmeter reading during the test is

9.6 volts or higher, the battery is good.
9.5 volts or below, the battery is defective and needs replacement.

Note: Results will vary with temperature. Low temperatures will reduce the voltage reading, so the electrolyte should be at 70'F or above. If not, use the following conversion table:

Voltage
Temperature
9.6
70'F or above
9.5
60'F
9.4
50'F
9.3
40'F
9.1
30'F
8.9
20'F
8.7
10'F
8.5
0'F