04 Ford F150 FX4 5.4L Battery Indicator

Asked by Sam Sep 05, 2020 at 09:33 PM about the 2004 Ford F-150 FX4 Ext. Cab 4WD

Question type: Maintenance & Repair

I have a 04 Ford F150 FX4 5.4L after replacing my coil packs, and plugs I got a Battery Indicator light came on.  So, I changed the Alternator, knowing the battery was weak, so the regulator I assumed took out the Alternator regulator on the new Alternator and was over charging the battery at 14.4A and cooked the battery, so I invested in a new 875 CCA with 150 reserve and another Alternator and put it in.  Ran for a few minutes then the battery light came back on. Note I cleaned all lug connection at time of Battery install, and stuck now on what could be the issue at this point.

2 Answers

Sam answered 4 years ago

After install of the 2nd Alternator and Battery, I get around 13.3V and I wrote 14.4A which should have read 14.4V not Amps sorry. I have a little OBDII tester and ran a battery check on the system, and it states "Battery Good, and Charging Good", so not really sure why I am having the Battery Indicator stay on at this point.

Mark helpful
74,180

OJ answered 4 years ago

Cost nothing to check. Off the positive side of the battery you should see two wires, maybe gray, running to the alternator. They may be gray in color covered with plastic or electrical tape. These are fusible links. unravel them and visually check that the link(s) are not blown. You can also disconnect them at both ends and use a multimeter to check continuity/resistance. If one link is blown or loose making bad contact, the battery can still be charged but the idiot light on the dash will come on.

Mark helpful

Your Answer:

Related Questions

  • 04 Ford F150 FX4 5.4L Battery Indicator 2 Answers

    I have a 04 Ford F150 FX4 5.4L after replacing my coil packs, and plugs I got a Battery Indicator light came on. So, I changed the Alternator, knowing the battery was weak, so the regulator I assumed...

    2004 Ford F-150 FX4 Ext. Cab 4WD

    -

    Maintenance & Repair

  • 2002 Ford F150 XLT FX4 4.6 ltr. 1 Answer

    Recently purchased and old owner had an extra key made it will go into the ignition and turn the truck over but will not crank it. I tried this key not realizing it was the wrong key about 5 or 6 time...

    2002 Ford F-150 XLT SuperCab 4WD SB

    -

    Maintenance & Repair

  • 2006 Ford F150 5.4l 3 valve 2 Answers

    What is involved in putting a 5.4l from a 1999 E350 2 valve into a 2006 F150 5.4l 3 valve and is this even possible?

    2006 Ford F-150

    -

    Maintenance & Repair

  • 2013 ford f150 fx4 3.5 ecoboost no crank no start 1 Answer

    truck quit while backing out of driveway. now it won't crank. brand new (today) battery, new alternator. new PCM relay (Aftermarket) verified as working. starter tested on vehicle, tank fuel pump te...

    2013 Ford F-150 FX4 SuperCrew 4WD

    -

    Maintenance & Repair

  • error codes 2004 fx4 f150 1 Answer

    which cylinder is 7 and 8 fx4 f150 2004

    2004 Ford F-150 FX4 Ext. Cab 4WD

    -

    Maintenance & Repair

Own this car?

Share your experience with others.

2004 Ford F-150

Write a car review

Review another car

Shortcuts

Search Ford F-150 Questions

CarGurus Experts

  • #1
    OJ
    Reputation
    42,450
  • #2
    Gene Arnett
    Reputation
    16,040
  • #3
    Rowefast
    Reputation
    15,840
View All

Know more, shop wisely

Search

Related Models For Sale

Used Chevrolet Silverado 1500
4,177 Great Deals out of 122,084 listings starting at $1,999
Used GMC Sierra 1500
1,876 Great Deals out of 69,074 listings starting at $2,500
Used Ford F-250 Super Duty
1,226 Great Deals out of 50,776 listings starting at $1,400
Used Toyota Tundra
1,071 Great Deals out of 31,484 listings starting at $2,250
Used Toyota Tacoma
2,247 Great Deals out of 54,444 listings starting at $4,995
Used Dodge RAM 1500
52 Great Deals out of 1,392 listings starting at $2,500
Used Ford Ranger
694 Great Deals out of 20,752 listings starting at $1,995
Used Ford Mustang
987 Great Deals out of 19,719 listings starting at $2,950
Used Chevrolet Silverado 2500HD
1,049 Great Deals out of 39,189 listings starting at $4,700
Used GMC Sierra 2500HD
547 Great Deals out of 24,772 listings starting at $5,900
Used Ford F-350 Super Duty
703 Great Deals out of 27,833 listings starting at $3,995
Used Ford Explorer
2,349 Great Deals out of 56,088 listings starting at $1,995

Used Cars for Sale

2024 Ford F-150 For Sale
120 Great Deals out of 94,730 listings starting at $28,944
2023 Ford F-150 For Sale
859 Great Deals out of 10,150 listings starting at $18,500
2022 Ford F-150 For Sale
766 Great Deals out of 7,860 listings starting at $14,824
2021 Ford F-150 For Sale
1,066 Great Deals out of 10,353 listings starting at $13,984
2020 Ford F-150 For Sale
531 Great Deals out of 5,583 listings starting at $5,500

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.