what causes a 94 F150 to discharge amps when headlights are turned on and then the check engine lights comes on

Asked by May 23, 2015 at 11:52 AM about the 1994 Ford F-150 XL 4WD SB

Question type: Maintenance & Repair

The amp hand drops real low when the headlights are turned on.  Then after a few minutes the check engine light comes on. The radio, ac, and dome light together do not affect the amps. Only the headlights.

1 Answer

71,025

Sounds like the alternator is dying or the alternator belt is slipping. Check the connections at the alternator as well. Make sure everything is clean and tight. HTH. -Jim

Your Answer

Ford F-150 Experts

  • #1
    OJ
    Reputation
    9,110
  • #2
    dandyoun
    Reputation
    4,580
  • #3
    tennisshoes
    Reputation
    3,160
View All

Related Models For Sale

Used GMC Sierra 1500
972 Great Deals out of 65,610 listings starting at $1,975
Used Dodge Ram 1500
356 Great Deals out of 10,817 listings starting at $1,500
Used Toyota Tacoma
540 Great Deals out of 44,378 listings starting at $1,790
Used Ford Mustang
540 Great Deals out of 35,434 listings starting at $1,200
Used Ford F-250
465 listings starting at $2,995
Used Chevrolet Tahoe
703 Great Deals out of 41,325 listings starting at $1,995
Used Ford Ranger
139 Great Deals out of 5,359 listings starting at $800

Used Cars For Sale

2018 Ford F-150 For Sale
69,247 listings starting at $20,867
2017 Ford F-150 For Sale
128 Great Deals out of 54,680 listings starting at $14,369
2016 Ford F-150 For Sale
148 Great Deals out of 7,789 listings starting at $17,194
2015 Ford F-150 For Sale
356 Great Deals out of 11,313 listings starting at $14,998
2014 Ford F-150 For Sale
509 Great Deals out of 14,228 listings starting at $9,900

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.