• Tiny
  • Larry Bain
  • Mercury Marquis

2002 mercury Grand Marquis LS, 4.6 liter engine, auto trans, 2 wheel drive, 45 k miles. New battery. Battery and alternator checked at checker auto, alternator was at 13 output. Trunk light disconnected, Light under hood disconnected. Red blinking light on top of dash always on. This car loses all battery response in 48 hours, will not even click or light the radio. Is it possible that the alternator is still the culprit and does not fully charge the battery? If not, what else do I check?

Do you
have the same problem?
Wednesday, August 8th, 2007 AT 12:52 PM

1 Reply

  • Tiny
  • rasmataz
  • Member

You have a short circuit that's draining it to verify disconnect positive battery cable put a test light to the batt. Pos. Post and the pos. Cable-when test light lits that confirms it.

Start removing fuse 1x1, when light turns off, that's the problem circuit.

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Wednesday, August 8th, 2007 AT 3:37 PM

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