Built-In Hydrometer

Sealed Battery:

On the top of the battery is a Built-In temperature compensated hydrometer. This hydrometer should be referred to during all diagnostic procedures involving the battery. When observing the hydrometer, make sure that the battery has a clean top. A light may be required in poorly lit areas.

Built-In Hydrometer Indications:

Under normal operation, two indications can be observed:
1. GREEN DOT VISIBLE
^ Any green appearance should be interpreted as a "green dot." The green dot denotes that the battery is ready for testing.
2. DARK: GREEN DOT NOT VISIBLE
^ If there is no green visible in the hydrometer, the battery needs to be charged before testing; refer to "Battery Charging". The charging and electrical systems should also be checked. Refer to Charging System for generator and charging system diagnosis.

Built-In Hydrometer Indications:

Occasionally, a third condition may appear:
3. CLEAR OR LIGHT YELLOW
^ If the hydrometer appears clear or has a light yellow color, it indicates that the electrolyte fluid is below the bottom of the hydrometer and is too low for diagnosis. This may have been caused by excessive or prolonged charging, a broken case, excessive tipping or normal battery wearout. When a hydrometer is displaying either of these conditions the battery should be replaced (it cannot be charged); refer to "Battery Replacement". The charging and electrical systems should also be checked. Refer to Charging System for generator and charging system diagnosis.