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Red battery light came on, Ford E150. #5086085
04/25/19 03:34 PM
04/25/19 03:34 PM
Joined: Mar 2013
Posts: 985
Florida
laserred96gt Offline OP
laserred96gt  Offline OP

Joined: Mar 2013
Posts: 985
Florida
Battery light came on today on my way home from work, I started thinking bad alternator so turned off the AC and radio and opened the windows waiting for the engine to die but luckily I made it home, ( I've been stranded by bad alternators twice before, not fun ). What do you guys think? Thanks.


2017 4Runner Limited, 46k
04 E-150, 4.6, 235K, Synblend 5w20.
11 Camry 2.5, 66K, PU 5w20.
Re: Red battery light came on, Ford E150. [Re: laserred96gt] #5086098
04/25/19 03:57 PM
04/25/19 03:57 PM
Joined: Mar 2018
Posts: 153
Missouri
Oily_Thing Offline
Oily_Thing  Offline

Joined: Mar 2018
Posts: 153
Missouri
I think you need to put a voltmeter on the battery with the engine off, and with the engine running.


2013 Cadillac XTS4 3.6
2015 Dodge Durango Limited 3.6
2011 Kawasaki Vulcan Voyager 1700
Re: Red battery light came on, Ford E150. [Re: laserred96gt] #5086099
04/25/19 03:57 PM
04/25/19 03:57 PM
Joined: Nov 2012
Posts: 644
Ajax,Ontario, Canada
Pelican Offline
Pelican  Offline

Joined: Nov 2012
Posts: 644
Ajax,Ontario, Canada
Originally Posted by laserred96gt
Battery light came on today on my way home from work, I started thinking bad alternator so turned off the AC and radio and opened the windows waiting for the engine to die but luckily I made it home, ( I've been stranded by bad alternators twice before, not fun ). What do you guys think? Thanks.


Could be Battery or Alternator, have it checked

Re: Red battery light came on, Ford E150. [Re: laserred96gt] #5086110
04/25/19 04:08 PM
04/25/19 04:08 PM
Joined: Nov 2008
Posts: 3,647
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline

Joined: Nov 2008
Posts: 3,647
Oshawa, Ontario Canada
How old is the truck and how old is the battery?

I would try to get both the alternator and battery load tested.

Are the terminal posts clean? What about battery level (if it's the type of battery that can have water added I'd check that too).


2015 Grand Caravan SXT Plus 5w-30 Valvoline White Bottle/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: Red battery light came on, Ford E150. [Re: laserred96gt] #5086112
04/25/19 04:11 PM
04/25/19 04:11 PM
Joined: Apr 2016
Posts: 244
Florida
1978elcamino Offline
1978elcamino  Offline

Joined: Apr 2016
Posts: 244
Florida
same thing happened to my 02 f150. To trouble shoot the first thing I did was get my son in the drivers seat watching the light, I tapped on the alternator with a hammer. The light went away but after a two mile test drive it came back. So, a reman alternator went on and to this day 60k later my brother in law is driving the truck today with no charging issues. Lots of f series among my friends and family, around 200k is when they begin failing. If I remember correctly, mine failed around 218k.


2018 F150 5.0
2016 Ford Fusion 2.5
Re: Red battery light came on, Ford E150. [Re: laserred96gt] #5086127
04/25/19 04:33 PM
04/25/19 04:33 PM
Joined: Mar 2013
Posts: 985
Florida
laserred96gt Offline OP
laserred96gt  Offline OP

Joined: Mar 2013
Posts: 985
Florida
Battery is platinum from a from advance Auto parts, 3.5 year old, I just pulled the alternator out to get it tested , it's a motorcraft so I'm assuming it's the original.


2017 4Runner Limited, 46k
04 E-150, 4.6, 235K, Synblend 5w20.
11 Camry 2.5, 66K, PU 5w20.
Re: Red battery light came on, Ford E150. [Re: laserred96gt] #5086128
04/25/19 04:33 PM
04/25/19 04:33 PM
Joined: Apr 2006
Posts: 9,430
Birmingham, AL
01rangerxl Offline
01rangerxl  Offline

Joined: Apr 2006
Posts: 9,430
Birmingham, AL
It probably needs an alternator, but do get the battery tested too.

The alternator in my 2002 Ranger went out just before 200K miles. Same symptom...battery light came on while driving and I could see on the Scangauge that it wasn't charging.


2002 Ford Ranger XLT | 3.0 V6 Auto 2WD | 229K miles
1994 Ford Ranger STX | 4.0 V6 Manual 4X4 | 201K miles
1994 Ford Explorer XLT | 4.0 V6 Auto 4X4 | 248K miles
Re: Red battery light came on, Ford E150. [Re: laserred96gt] #5086233
04/25/19 06:13 PM
04/25/19 06:13 PM
Joined: Dec 2017
Posts: 2,098
US
JLTD Offline
JLTD  Offline

Joined: Dec 2017
Posts: 2,098
US
Sudden failure I'd check the belts first, then alt and battery.


I use the overseas manual to choose my oil viscosity.

Using AMSOIL

Hers: 2008 Jeep Liberty 147k, SS5w30/Amsoil

His: 2015 4Runner 53k, OE5w30/Wix

Re: Red battery light came on, Ford E150. [Re: laserred96gt] #5086239
04/25/19 06:20 PM
04/25/19 06:20 PM
Joined: Oct 2014
Posts: 13,732
Canyon County Idaho
CT8 Offline
CT8  Offline

Joined: Oct 2014
Posts: 13,732
Canyon County Idaho
Bob is my battery light is on guy.


2015 F150 2.7
2018 F350 6.2
Re: Red battery light came on, Ford E150. [Re: CT8] #5086256
04/25/19 06:29 PM
04/25/19 06:29 PM
Joined: Mar 2013
Posts: 985
Florida
laserred96gt Offline OP
laserred96gt  Offline OP

Joined: Mar 2013
Posts: 985
Florida
Originally Posted by CT8
Bob is my battery light is on guy.

Haha yeah, it was the a bad alternator, got the new one in.
I was waiting for it to fail and I was hoping to not get stranded. Thanks for the replies guys.


2017 4Runner Limited, 46k
04 E-150, 4.6, 235K, Synblend 5w20.
11 Camry 2.5, 66K, PU 5w20.
Re: Red battery light came on, Ford E150. [Re: JLTD] #5086410
04/25/19 08:19 PM
04/25/19 08:19 PM
Joined: Apr 2018
Posts: 237
US
talest Offline
talest  Offline

Joined: Apr 2018
Posts: 237
US
Originally Posted by JLTD
Sudden failure I'd check the belts first, then alt and battery.


Yes. Belt snap, alternator stops charging, battery light comes on. That is the most common cause, battery light indicates charging system problem, and the car will run fine until the battery goes dead.

The RC number on your battery is supposed to indicate how long in minutes this will be, given alternator failure, to get your vehicle to safety where it can be serviced by an automotive professional.

Re: Red battery light came on, Ford E150. [Re: laserred96gt] #5086854
04/26/19 08:55 AM
04/26/19 08:55 AM
Joined: Apr 2016
Posts: 244
Florida
1978elcamino Offline
1978elcamino  Offline

Joined: Apr 2016
Posts: 244
Florida
so how about a follow up returning from the alt test, would like closure.
when I replaced mine I went shopping online to find one locally since I couldent wait to order one. I found pepboys to be the least expensive using their online coupon code. I think it was about 69 bucks, everyone else was over 100, and that was for a reman. Opening the box I was shocked at that price it even came with the pulley


2018 F150 5.0
2016 Ford Fusion 2.5
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