Battery Testing Procedure

STEP 1. Check the battery cables.
Remove the negative cable, then the positive cable.

Check for dirty or corroded connections.

Q: Are the battery cables dirty or have corroded connections?
- YES: Clean the battery cables. Then go to Step 2.
- NO: Go to Step 2.
STEP 2. Check the battery post.
Check for loose battery post.

Q: Are the battery posts faulty?
- YES: Replace the battery. Then go to Step 4.
- NO: Go to Step 3.
STEP 3. Check the battery case.
1. Remove the hold-downs.
2. Check for broken/cracked case.
Q: Is the battery case faulty?
- YES: Replace the battery. Then go to Step 4.
- NO: Go to Step 4.
STEP 4. Check the open circuit voltage.
1. Turn headlights on for 15 seconds.
2. Turn headlights off for two minutes to allow battery positive voltage to stabilize.
3. Disconnect the battery cables.
4. Read open circuit voltage.
Q: Is open circuit voltage 12.4 volts or more?
- YES: Go to Step 6.
- NO: Go to Step 5.
STEP 5. Battery charging
Charge the battery. (See CHARGE RATE CHART .)

Q: Is open circuit voltage 12.4 volts or more?
- YES: Go to Step 6.
- NO: Replace the battery.
STEP 6. Check the load test.
1. Connect a load tester to the battery.
2. Load the battery at the recommended discharge rate (See LOAD TEST RATE CHART ) for 15 seconds.
3. Read voltage after 15 seconds, then remove load.
4. Compare the measured value with the minimum voltage. (See LOAD TEST CHART .
Q: Is the voltage higher than minimum voltage?
- YES: The battery is normal.
- NO: Replace the battery.

LOAD TEST RATE CHART

Condition	Load test	Cranking ratio [-18°C (0°F)]	Reserve capacity
34B19L (S)	130 amps	272 amps	49 minutes

LOAD TEST CHART

Temperature °C (°F)	21 (70) AND ABOVE	16 (61) to 20 (68)	10 (50) to 15 (59)	4 (40) to 9 (48)	-1 (31) to 3 (37)	-7 (20) to -2 (28)	-12 (11) to -8 (17)	-18 (0) to -13 (8)
Minimum voltage	9.6	9.5	9.4	9.3	9.1	8.9	8.7	8.5