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internal88, ASE Certified Technician
Category: Nissan
Satisfied Customers: 2572
Experience:  I have been working in the technican for over 15 years. I am an expert in diagnostic.
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1999 Nissan quest. while driving on freeway battery and

Customer Question

1999 Nissan quest. while driving on freeway battery and brake light comes on dash and stays on. No other symptoms at this time. What's wrong?
Submitted: 1 year ago.
Category: Nissan
Expert:  internal88 replied 1 year ago.

Hello, I'm Brandon - Nissan tech.

Most likely it is a weak alternator that is not charging the battery fully.

I would suggest you to check the alternator output by using a voltmeter. Check to see if the alternator is outputting at least 14 volts from the battery with the engine ON.

Please rate me positive, Thank you. Let me know if you have further questions.