Battery Light

Just gonna tell you, while the engine is running the battery light will only come in for an alternator problem.

I replaced my alternator when my battery light came on. 6 months later the battery light came back on and I replaced the alternator again. 4 months later the battery light comes back on alerting every 2-3 mins. I resolved the issue by replacing the Alternator Harness Connector Plug 3 Wire Pigtail. I guess he clip broke while replacing the alternator and it would vibrate itself lose. It was an $8 repair.

1st of all whoever thinks that just because the battery light comes on it's an alternator you're an idiot especially when it comes to afford of this year Make sure you have a good battery that has a good load Make sure grounds in wires are connected correctly on the Alternator And these These vehicles are known just like the expedition's For badd fuse boxes Causing electrical problems

My f150 light came on today when I glanced at the gauge the needle was almost to the right like it was over charging then it went back to normal and the light went off anybody know what this could be thanks dan

I have a 2013 ford f150 3.5 the battery light keep coming on but the battery is new and the alternator is changing

Alright all you cool cats and kittens. My battery light turned on coming home from work. When I accelerated, the light turned off. Eventually, one by one all my electrical went out. Even the dash, all gauges, went off. As my headlights started to dim, I turned on my high beams which drew power from the engine and bogged down the RPM. I pulled into a parking spot and as soon as the engine went to idle, the truck shut off. All signs point to alternator, right? Today I put in a new alternator. And, for shnitz and giggles, I tried to start my truck without ever charging the battery. The truck started no problem, again, I never charged the battery from last night. I let the truck idle for a few minutes and the battery light is coming back on. Any ideas???

Same thing happened to me in my 05 4.6 f150. Changed the battery and alternator, light still comes on. Guessing it’s a stored code, wiring, or a ground issue.

On my 2001 F-150, I have changed out the battery and alternator, and serpentine since I had it off, anyway. Batter light stays on. Battery Voltage gauge is at about 75% to the top. With engine off, I’m getting 12.4 volts at the battery. After starting, I’m getting 14.4 volts at idle, at 1500 Rpm, about the same. Under load with high beams and radio,almost-identical. 14.45 And still the battery light stays on. Checked ODBC codes and saw nothing. So I am stymied. All appearances say my charging system is working, except the battery light. Any idea what else is triggering that light?

battery light has been going on for last three weeks....had it checked last oil change and they said battery is fine. Light still goes on and just lately the heat/Ac goes on and off like it's possessed. And now this morning everything was dead. 2011 F-150. ??

Following having the same

Same issue here

Same issue. 2014 5.0... changed the alternator, battery, two pulleys, serpentine and water pump AND STILL COMES UP WITH A BATTERY LIGHT.. WTF

I've sorted through all the comments, trying to narrow down my problem. F150, 2006 (new to me, so I don't know its history). It was parked for a few weeks, and when I started it (no problem), the light was on. I figured if I ran it for a while, the alternator would recharge the battery, but no go, and I lost my power steering. If you can help me narrow this down so that I can go into a shop with some ideas, that'd be great, because as a woman, if i go in and shrug my shoulders and say, "I don't have a clue," they'll take me to the cleaners.

Same issues with my 2010 f150. Losing power while pulling a trailer too. I’m at a loss.

I think it's funny we all rely on what others have done throughout the forums instead of doing raw true diagnostics. I just got done with yet another one of these problems.. (yes multiple instances of battery light on after replacing everything.. and I'm the tail end diagnostic troubleshooter.) Folks.. is your battery ground to chassis reading less than 1 ohm? Just had this truck reading 60 ohms from the battery post to chassis.. unacceptable. Then.. what is the voltage drop from the battery post to that actual input of the lug from the battery? Is it less than .5 VDC? HAD another truck dropping 4v at the fuse block because of a corroded lug. Ford have a nasty habit of not taking care of the battery terminals which will always throw the charging system thru a loop. A lot of times its these simple connections but we throw $$$ thinking that's the issue because some forum says so...