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14
BATTERIES
BATTERY TROUBLESHOOTING EXAMPLES
The following information represents a few examples of troubleshooting battery problems.
Example 1
Vehicle no. 68 was suspected of having a bad battery due to its performance. As a result, the battery charger
test was performed. After a full charge, the battery charger ammeter read 8.0 amps. Next, the on-charge volt-
age test was performed and the following results were recorded:
BATTERY NO.
On-Charge Voltage
*Battery no. 3 appears suspect. Batteries no. 1 and 4 are also suspect. Next, a hydrometer test should be
conducted on all batteries.
Hydrometer test results:
CELL NUMBER
Cell 1 (Positive Post)
Cell 2
Cell 3 (Negative Post)
*After the hydrometer test, it appears that battery no. 1 is the problem. Next, the discharge test was per-
formed.
Discharge test results:
BATTERY NO.
Discharge Voltage
*After a discharge test which lasted 45 minutes, battery no. 1 is clearly shown to be the problem. Battery no.
4 should be watched a little more closely but appears to be okay. Battery no. 1 should be replaced with a bat-
tery that has about the same age and usage as the other batteries in the set.
Example 2
Vehicle no. 70 was also suspected of having a bad battery due to its performance. The battery charger test
showed 7.0 amps after a full charge. After confirming there were no problems with the electrical system,
charger or brakes, the on-charge voltage was recorded as follows:
BATTERY NO.
On-Charge Voltage
*Battery no. 2 was immediately suspected as the problem. After checking battery no. 2 with a hydrometer, it
was discovered that the negative post cell was completely dead. Battery no. 2 should be replaced with a bat-
tery that has the same age and usage as the other batteries in the set.
Page 14-14
2008-2011 IQ Plus Electric Vehicle Maintenance and Service Supplement
1
2
3
7.40 V
7.60 V
7.10* V
BATTERY NUMBER
1
2
3
1.200*
1.265
1.300
1.285
1.275
1.290
1.265
1.270
1.275
1
2
3
3.80* V
5.25 V
5.65 V
1
2
3
7.40 V
7.10* V
7.45 V
4
5
6
7.40 V
7.70 V
7.80 V
4
5
6
1.250
1.280
1.260
1.260
1.270
1.295
1.265
1.265
1.265
1.280
1.275
1.275
4
5
6
5.25 V
5.50 V
5.60 V
4
5
6
7.6 V
7.65 V
7.50 V
Battery Testing
7
8
7.80 V
7.80 V
7
8
1.260
1.265
1.275
7
8
5.70 V
5.30 V
7
8
7.55 V
7.65 V
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Troubleshooting
