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All "check" lights come on briefly when starting your engine. This is to make sure the light is working if soemthing does malfunction on your vehicle. If the light comes on while driving you may have broken or loose belts.

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Q: Your 2002 Jetta's Battery Light came on for a brief time after starting but went off after a short time What does this mean or what should you check?
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How does the battery charger tell you the battery is charged?

generally speaking, there are several LED lights on the battery charger, when the light is red, it meas the battery is being charged, when the light turn to green or yellow, it means the battery is full charged


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I am going to assume you meant Three wires, Battery and Light Bulb. (punctuation and plurals are important) Hook the light to one post of the battery Hooked from the light to the item being tested (use the other light connection, not the one connected to the battery) connect the other end of the test item to the unused terminal on the battery. Light comes on means it conducts electricity No Light, it does not.


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Should a Low Battery warning light come on as the battery reaches a critical low point?

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