Do your headlights get dim and then brighten up when you bring up the rpms? If so its most likely an alternator, all though an alternator shouldn't cause the check engine light to come on. The best way to check an alternator is to put a voltage meter on it, it should be charging around 14 volts
2000 Ford F-150 Lariat Extended Cab LB
-
Maintenance & Repair
i can't clear the codes because it keeps showing the battery light on
2013 Ford F-150 XLT SuperCrew LB 4WD
-
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 alt...
1998 Ford F-150 XLT Extended Cab SB
-
Maintenance & Repair
I changed out the alternator and battery on my 97 F150, however, the battery light stays on. How do i reset it to turn off?
1997 Ford F-150
-
Maintenance & Repair
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
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.