BATTERIES: ELECTRIC VEHICLE WITH
POWERDRIVE CHARGER
Battery Testing – 8 Volt
15
BATTERY TESTING – 8 VOLT
See General Warnings on page 1-2.
Three tests have been developed to help diagnose problems with batteries that have not performed as expected.
Because each test becomes progressively more detailed and time-consuming, begin with the first test and proceed
with each additional test until the problem has been identified.
FULLY CHARGE BATTERIES TEST
NOTE:
Make sure the hardware securing battery cable terminals to battery posts is tightened to the specified torque.
See Connecting the Batteries – Electric Vehicles, Section 1, Page 1-4.
The easiest way to monitor the condition of a vehicle’s batteries is simply to observe the reading on the battery charger
ammeter at the end of the charge cycle and record the voltage of the battery set. After a full charge, disconnect the
charger DC plug, wait 20 to 30 seconds and reconnect the charger DC plug. Wait approximately 10 to 20 minutes until
battery set voltage rises above 56 volts and then record the ammeter and battery set voltage readings simultaneously
(to the nearest 0.1 for amps and volts).
• If the ammeter reading is below 6.0 amps and on-charge battery set voltage is above 56.0 volts, proceed to the
Hydrometer Test.
• For all other readings, check the battery charger for proper output and operation. Recharge the batteries and repeat
the Fully Charge Batteries Test.
• If after repeated attempts the charger does not fall below 6.0 amps and over 56.0 volts, record the test values
as measured and proceed to the Hydrometer Test.
HYDROMETER TEST
NOTE:
Specific gravity is dependent on electrolyte temperature. Note and record electrolyte temperature of each
cell before performing the Hydrometer Test. Use these temperature measurements to determine Corrected
Specific Gravity.
See Hydrometer Calibration on page 15-4.
A hydrometer (CC P/N 1011478) or digital refractometer (CC P/N AM1285701) measures the specific gravity of the
battery’s electrolyte. The higher the specific gravity, the higher the state of charge of the batteries. A fully charged
battery should read between 1.250 and 1.280 at 80 °F (26.7 °C). Never add acid to batteries to obtain a higher
specific gravity.
See following CAUTION.
CAUTION
• Do not allow battery acid from battery caps or hydrometer to drip onto the front or rear body of the
vehicle. Battery acid will cause permanent damage. Wash immediately.
IMPORTANT: Be sure batteries have sufficient electrolyte to cover plates by approximately 1/2 inch (13 mm)
and are fully charged prior to beginning test. If electrolyte level is insufficient to obtain valid readings, add
only enough distilled water to cover the plates, then recharge the batteries and proceed to the Discharge Test.
2014 Precedent
®
Golf Car Maintenance and Service Manual
Page 15-3
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