For 1990-2009 cars only
A hydrometer is built into the maintenance-free battery. The hydrometer is temperature-compensated. The color on the hydrometer indicates the condition of the battery.
Under normal operation, one of two color conditions on the hydrometer is possible:
| • | A green dot or floating ball |
| • | A dark condition, with no green visible |
A green dot on the hydrometer means the battery is ready for testing.
If the hydrometer is dark with no green visible, and there is a cranking complaint, inspect for trouble in the charging or electrical systems.
Occasionally, a clear or light yellow color appears. This means the battery fluid level is below the bottom of the hydrometer. A low fluid level can be caused by any of the following conditions:
| • | A prolonged charge |
| • | An excessive charge |
| • | A broken case |
| • | Excessive battery tipping |
| • | A faulty charging system |
Replace the battery if its condition affects the cranking system.
