Alternator harness

Asked by Dec 04, 2017 at 10:02 PM about the 2003 Mercury Grand Marquis

Question type: Maintenance & Repair

I  have a 03 grand marquis and my
battery light stays on  after I start it up
for a while it cuts off  and I replace the
alternator and  battery... so if I had a
bad alternator harness would it like
juice the battery down some.. so
could anyone help me please and
thank you

1 Answer

72,135

A bad alternator harness may cause the alternator not to charge resulting in the battery running down while the vehicle is running. If you have access to a dc voltmeter you can check the voltage at the battery engine running. It should be somewhere between 13.5 and 14.7 volts. If it in the 12s the alternator is not charging and the cause needs to be determined.

1 people found this helpful.

Your Answer:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    6,310
  • #2
    Js08016
    Reputation
    2,310
  • #3
    kbro
    Reputation
    2,280
View All

Related Models For Sale

Used Lincoln Town Car
23 Great Deals out of 1,315 listings starting at $1,650
Used Ford Crown Victoria
725 listings starting at $2,979
Used Chevrolet Impala
526 Great Deals out of 22,834 listings starting at $575
Used Mercury Marauder
26 listings starting at $7,599
Used Ford F-150
2,938 Great Deals out of 193,442 listings starting at $1,000
Used Ford Mustang
525 Great Deals out of 39,031 listings starting at $1,200
Used Lincoln Continental
21 Great Deals out of 3,088 listings starting at $20,000
Used Toyota Camry
936 Great Deals out of 69,605 listings starting at $1,000
Used Chevrolet Tahoe
676 Great Deals out of 38,235 listings starting at $1,199
Used Ford Taurus
205 Great Deals out of 15,817 listings starting at $1,350
Used Honda Accord
912 Great Deals out of 82,446 listings starting at $1,000

Used Cars for Sale

2011 Mercury Grand Marquis For Sale
25 listings starting at $3,491
2010 Mercury Grand Marquis For Sale
64 listings starting at $3,995
2009 Mercury Grand Marquis For Sale
80 listings starting at $1,900
2008 Mercury Grand Marquis For Sale
8 Great Deals out of 102 listings starting at $1,950

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. Content will be removed if CarGurus becomes aware that it violates our policies.