Not charging

Asked by Mar 07, 2017 at 09:44 AM about the 1998 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

I have a 1998 grand marquis bought new battery and new
alternator yet when car is on it only charge at 12.5 and
when it is off when the key in on the battery symbol
doesn't show.

5 Answers

76,295

The wiring to the alternator would need to be checked. Make sure there is not a broken wire at the plugin.

Has brand new pigtail Rowefast , when I put the car in on position the battery doesn't show on the dash but once I start the car and put a multi meter it shows 12.5 but if I accelerate it just goes up to 13.5 and then it shows battery on dash, changed alternator twice , new belt , new battery. Can a ground be causing that?

76,295

The alternator is grounded when it's bolted to the mount, and the other grounds would be good since the car is starting. When you took the other alternator off was it tested? It sure sounds like it is still a bad alternator.

Yes, there was a new pigtail put on it the colors are yellow , white and light green , the yellow and green are connected to the yellow and green from the car but the white one from the pigtail isn't would you know where that goes there is no spot for that one but the white wire is also throwing 13 volts any ideas?

76,295

It looks like there are 3 wires that need to be hooked up. The yellow and green one sound like they are connected to the correct wires, the white wire is what needs to get connected somewhere, but I'm am not sure where. Look for another white wire, check up the wiring harness to see if there is an open wire. You may have to search on line for a wiring diagram.

Your Answer

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 1,708 nationwide Grand Marquis listings starting at $800.

ZIP:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,840
  • #2
    kbro
    Reputation
    2,160
  • #3
    Js08016
    Reputation
    1,930
View All

Related Models For Sale

Used Lincoln Town Car
33 Great Deals out of 1,734 listings starting at $500
Used Ford Crown Victoria
3 Great Deals out of 966 listings starting at $1,496
Used Chevrolet Tahoe
832 Great Deals out of 41,908 listings starting at $1,987
Used Ford Mustang
598 Great Deals out of 39,167 listings starting at $1,895
Used Ford F-150
3,230 Great Deals out of 220,455 listings starting at $1,200
Used Honda Accord
1,104 Great Deals out of 73,074 listings starting at $1,100
Used Ford Taurus
245 Great Deals out of 14,990 listings starting at $1,800
Used Toyota Camry
1,117 Great Deals out of 86,589 listings starting at $800
Used Lincoln Continental
18 Great Deals out of 3,408 listings starting at $32,794

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
26 listings starting at $5,900
2010 Mercury Grand Marquis For Sale
7 Great Deals out of 98 listings starting at $4,688
2009 Mercury Grand Marquis For Sale
82 listings starting at $2,999
2008 Mercury Grand Marquis For Sale
5 Great Deals out of 151 listings starting at $800
2007 Mercury Grand Marquis For Sale
6 Great Deals out of 143 listings starting at $1,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.