GM Service Manual Online
For 1990-2009 cars only

Battery Hydrometer Displays Yellow Dot

Step

Action

Yes

No

1

Was a Battery Check performed?

Go to Step  2

Go to Battery Check

2

Tap the hydrometer lightly on top with the handle of a small screwdriver to dislodge any air bubbles inside the battery.

Is the hydrometer dot still yellow?

Go to Step  4

Go to Step  3

3

Does the hydrometer display a green or dark dot?

Hydrometer OK

Go to Step  4

4

Replace the battery. Refer to Battery Replacement .

Did you complete the replacement?

Go to Step  5

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5

Visually inspect the hydrometer in the new battery.

Does the hydrometer display a green dot?

Go to Step  11

Go to Step  6

6

Does the hydrometer display a yellow dot?

Go to Step  7

Go to Step  9

7

Tap the hydrometer lightly on top with the handle of a small screwdriver to dislodge any air bubbles inside the battery.

Is the hydrometer dot still yellow?

Go to Step  4

Go to Step  8

8

Does the hydrometer display a green dot?

Go to Step  11

Go to Step  9

9

Does the hydrometer display a dark dot?

Go to Step  10

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10

Charge the battery. Refer to Battery Charging

Was the battery recharged?

Go to Step  11

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11

Check the charging system for proper operation. Refer to Charging System Check

Is the charging system OK?

Hydrometer OK

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