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lukest ... 1/5/2013
2003 Nissan Altima SE 16Cyl8.0L - Body & Interior
why is 03' 3.5v6 altima SE interior/headlights and brakelights flashing when car is running?
the alternator is putting out 14.2 volts.
battery is grounded to transmission.
does not flash when key is on only.
no battery or check engine light on.
1 Answer
  • Jimm
    Jimm 1/5/2013
    Several possibilities; poor / loose / corroded ground connection - either at the battery or at the chassis ground connection. Check this first - should be clean and tight. Next, check the positive battery connection - same; should be clean and tight. Then, check the fuses and relay panel - look for any loose connections, clean any evidence of corrosion - sometimes the fuses can build up a slight corrosion on the electrical contact surfaces. Simply, unplug and reinsert - in most cases this will clean them.
    The next check is the alternator or serpentine drive belt - check for the correct tension, be sure the belt tensioner is not faulty or worn. Check the belt condition, be sure there are no glazed spots or belt pieces missing. Replace as required.
    Try the many on-line auto parts sources, such as; or for the replacement parts.

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