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OPERATION AND SERVICE INFORMATION

Page 23

Owner’s Manual and Service Guide

Read all of Manual to become thoroughly familiar with this vehicle. Pay particular attention to all Notes, Cautions and Warnings

In some portable chargers, there will be a rattle present in the
body of the charger DC plug. This rattle is caused by an internal
magnet contained within the charger plug. The magnet is part
of the interlock system that prevents the vehicle from being
driven when the charger plug is inserted in the vehicle charging
receptacle.

AC Voltage

Battery charger output is directly related to the input volt-

age. If multiple vehicles are receiving an incomplete

charge in a normally adequate time period, low AC volt-

age could be the cause and the power company should

be consulted.

TROUBLESHOOTING

In general, troubleshooting will be done for two distinct

reasons. First, a battery that performs poorly and is out-

side of the manufacturers specification should be identi-

fied in order to replace it under the terms of the

manufacturer’s warranty. Different manufacturers have

different requirements. Consult the battery manufacturer

or a manufacturer representative for specific require-

ments.

The second reason is to determine why a particular vehi-

cle does not perform adequately. Performance problems

may result in a vehicle that runs slowly or in a vehicle that

is unable to operate for the time required.

A new battery must

mature

before it will develop its max-

imum capacity. Maturing may take up to 100 charge/dis-

charge cycles. After the maturing phase, the older a

battery gets, the lower the capacity. The only way to

determine the capacity of a battery is to perform a load

test using a discharge machine following manufacturer’s

recommendations.

A cost effective way to identify a poorly performing bat-

tery is to use a hydrometer to identify a battery in a set

with a lower than normal specific gravity. Once the partic-

ular cell or cells that are the problem are identified, the

suspect battery can be removed and replaced. At this

point there is nothing that can be done to salvage the

battery; however, the individual battery should be

replaced with a good battery of the same brand, type and

approximate age.

Hydrometer

A hydrometer (P/N 50900-G1) is used to test the state of

charge of a battery cell (Ref Fig. 26 on page 24). This is

performed by measuring the density of the electrolyte,

which is accomplished by measuring the specific gravity

of the electrolyte. The greater the concentration of sulfu-

ric acid, the more dense the electrolyte becomes. The

higher the density, the higher the state of charge.

To prevent battery explosion that could result in
severe personal injury or death, never insert a
metal thermometer into a battery. Use a
hydrometer with a built in thermometer that is
designed for testing batteries.

Specific gravity is the measurement of a liquid that is

compared to a baseline. The baseline is water which is

assigned a base number of 1.000. The concentration of

sulfuric acid to water in a new golf car battery is 1.280

which means that the electrolyte weighs 1.280 times the

weight of the same volume of water. A fully charged bat-

tery will test at 1.275 - 1.280 while a discharged battery

will read in the 1.140 range.

Do not perform a hydrometer test on a battery that has just
been watered. The battery must go through at least one charge
and discharge cycle in order to permit the water to adequately
mix with the electrolyte.

The temperature of the

electrolyte

is important since the

hydrometer reading must be corrected to 80° F (27° C).

High quality hydrometers are equipped with an internal

thermometer that will measure the temperature of the

electrolyte and will include a conversion scale to correct

the float reading. It is important to recognize that the

electrolyte temperature is significantly different from the

ambient temperature if the vehicle has been operated.