Built-in Indicator
The battery has a built-in temperature compensated indicator in the top of the battery. See Fig 1. This indicator is to be used with the following diagnostic procedure. When checking the indicator, make sure that the battery has a clean top. A light may be needed in some poorly-lit areas.
Three types of indication available under normal operation are as follows.
- Green Dot
Battery is sufficiently charged for testing.
- Dark
Battery must be charged before testing. If there is a cranking complaint, battery should be tested as described in BATTERY INSPECTION . Charging and electrical systems should also be checked at this time.
- Clear or Light Yellow
This means that fluid level is below the bottom of hydrometer. Its possible cause is excessive or prolonged charging, a broken case, excessive tipping or normal battery deterioration. When the battery is found in such condition, it is possible that high charging voltage is caused by the faulty charging system and therefore, charging and electrical systems need to be checked. If there is a trouble in cranking and its cause lies in the battery, it should be replaced.