Question about Mercury Grand Marquis

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1998 mercury grand battery not charging put new alternator and battery still not working

1998 mercury grand battery not charging put new alternator battery still not working

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Is the battery light on the dash board working? If the light does not work the alternator will not charge, it needs the power from the light to energise the rotor.

Posted on Dec 31, 2013

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Posted on Jan 02, 2017

paulrelliott
  • 69 Answers

SOURCE: 1999 GS300 alternator not working

No, You've gone down that route of changing alternator's (3 times too many) you need to find an auto-electrician, or if you know your way around a multimeter then test the battery voltage when stopped should be 12 V , when running should be around 14 V. & they should test the current being drained with the car off & hunt down the power drain taking system's off line one by one.
Hope this help's !

Posted on Sep 21, 2009

  • 12 Answers

SOURCE: Charging system

change your battery cables and check all wires on the alternator for loose connections, expecially the grounds.

Posted on Oct 12, 2008

wireguy212
  • 1627 Answers

SOURCE: my 1998 jeep grand cherokee isint charging, ive

On the terminal maked"l" you need to put switched power from the ignition[ the problem], will go away.If this is not an option then you can get an alternator repair shop to put a self exciting regulater and it will kick in with a quick rev of the engine,no wireing required

Posted on Dec 08, 2009

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I have a 1987 mercury grand marquis with v8 my alt is new my battery is new and my battery keeps going died what wrong help


A lot of alternatives even though they are new can be no good, remove the negative battery cable, if the car continues to run, you have a bad alternator

May 01, 2017 | Mercury Cars & Trucks

1 Answer

Battery drains


Assume you mean drains of power not fluid. Does battery light show on dash with engine running. Make sure that the alternator drive belt is correctly tensioned (longest side betwen pullys move 1/2" up/down). If it takes a few days to loose charge temp fix is to use a solar battery charger that can charge battery when car is parked. Hope this helps.

Aug 13, 2016 | Mercury Cars & Trucks

1 Answer

My 2000 Mercury Grand Marquis my alternator is not charging the battery tested good new alternator


http://www.bbbind.com/free_tsb.html free wiring diagrams . There are three wires connected to the alternator , should have B+ voltage , if not the alternator will not work . Do you know how to test for B+ voltage ? You can go to you tube an watch video's on charging system testing . Good luck !

Feb 24, 2016 | Mercury Cars & Trucks

1 Answer

I have a 1998 mercury mystique LS, V6 alternator problem


It is possible the replacement alternator is defective.

Jan 13, 2014 | 1998 Mercury Mystique

1 Answer

1998 mercury grand battery not charging put new alternator still not working


Has the battery been checked to see if it is good?

An alternator cannot charge a bad battery

Dec 29, 2013 | Mercury Grand Marquis Cars & Trucks

1 Answer

Battery light comes on and off in 1998 mercury grand marquis


Sounds like the voltage regulator in the alternator. Or the alternator is going out.

Nov 04, 2012 | 1998 Mercury Grand Marquis

1 Answer

Replacing voltage regulator in mercury grand marquis


CChange battery and clean the terminals. The alternator is not designed to be your main power supply - it just keeps your battery charged - which is your primary power supply

Nov 15, 2011 | 1998 Mercury Grand Marquis

1 Answer

Hello. My 1993 Mercury Grand Marquis died on the highway after the battery "alternator?" light coming on about 20 minutes prior. We replaced the alternator with a rebuilt and the light is STILL...


A ford needs a fully charged battery to work the alternator. You may burn out the replacement alternator by hooking it up to a dead battery. Get the battery charged and have it load tested. You may have a bad battery and it should be checked. http://www.cardone.com/english/club/select/electrical/protech/tech_bulletins/PT37-0006.pdf

May 21, 2011 | Ford Crown Victoria Cars & Trucks

1 Answer

Battery light, charge/discharge, comes on and stays on. Had the alternator checked and installed a new battery.


There is a diode inside the alternator that controls the charge light. It is possible for this diode to go bad even thought the alternator is charging like it is supposed to. Only way to really tell is to replace alternator.
Hope this helps

Aug 26, 2010 | 1998 Mercury Grand Marquis

2 Answers

It start with new battery but then it dies


dies right away or over time. if it is over time you probably have a charging problem, probably the alternator. pull it out and take it to a parts store most of them will load test it for free before popping for a new alternator

Oct 27, 2009 | 1998 Mercury Grand Marquis

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