Changed alternator battery light still on
80

Asked by 98ferd Nov 05, 2019 at 11:56 AM about the 1998 Ford F-150 XLT Extended Cab SB

Question type: Maintenance & Repair

98 f150 4.2l battery light came on while
driving. Travelled 20 miles then truck died.
Boosted it and it ran until boost was
dissconected. Put battery on charger truck
ran to get home. Replaced alternator same
issue is happening

1 Answer
4,160

lincolnscott49 answered 4 years ago

If the battery is low on charge and jumped to start the alternator is working overtime and can burn up the internal voltage regulator. Both must be good. If I get a dead battery i have it charged and checked under a load first and check for why it drew down. Removing and checking the alternator as well at the same time off the car is also a good idea but can be tested for output while on the car after battery is charged and good.. If bot check out fine and battery is charged I then check for a parasitic draw..

Mark helpful

Your Answer:

Related Questions

  • Changed alternator battery light still on 1 Answer

    98 f150 4.2l battery light came on while driving. Travelled 20 miles then truck died. Boosted it and it ran until boost was dissconected. Put battery on charger truck ran to get home. Replaced alt...

    1998 Ford F-150 XLT Extended Cab SB

    -

    Maintenance & Repair

  • battery light comes on when starting the truck i have replaced the battery and alternator 1 Answer

    i can't clear the codes because it keeps showing the battery light on

    2013 Ford F-150 XLT SuperCrew LB 4WD

    -

    Maintenance & Repair

  • Battery Light ON... Drains while running 1 Answer

    A few days ago, battery light came ON... Then pretty dramatic draw on Battery Gauge became evident. Had Alternator checked... tested bad Voltage regulator which is inside the Alternator. Changed out ...

    2001 Ford F-150 XLT Extended Cab LB

    -

    Maintenance & Repair

  • Changed battery and alternator now wont star 3 Answers

    I just changed my batt. And alt., Would start b4 with jump, but now it wont start at all

    2004 Ford F-150 Lariat Ext. Cab

    -

    Maintenance & Repair

  • Battery light stays on and battery drains while driving 1 Answer

    I have a 2002 ford F150 and the alternator went out changed it but the battery light stayed on and the battery drained, so I replaced the battery and PCM and battery cables and selenoid still have t...

    2002 Ford F-150 XLT 4WD SB

    -

    Maintenance & Repair

Shortcuts

Search Ford F-150 Questions

CarGurus Experts

  • #1
    OJ
    Reputation
    41,870
  • #2
    Gene Arnett
    Reputation
    15,990
  • #3
    Rowefast
    Reputation
    15,490
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
167 Great Deals out of 7,420 listings starting at $6,995
Used GMC Sierra 1500
141 Great Deals out of 7,842 listings starting at $4,944
Used Ford F-250 Super Duty
23 Great Deals out of 748 listings starting at $3,990
Used Toyota Tacoma
42 Great Deals out of 780 listings starting at $9,975
Used Dodge RAM 1500
3 Great Deals out of 81 listings starting at $3,990
Used Ford F-250
6 listings
Used Ford Mustang
35 Great Deals out of 1,596 listings starting at $7,999
Used Ford Ranger
25 Great Deals out of 690 listings starting at $6,445
Used Chevrolet Silverado 2500HD
22 Great Deals out of 1,590 listings starting at $5,990
Used Ford Explorer
62 Great Deals out of 1,825 listings starting at $6,990
Used Toyota 4Runner
22 Great Deals out of 524 listings starting at $14,995
Used Jeep Wrangler
143 Great Deals out of 5,937 listings starting at $2,995

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