What causes a battery light to go out in a Ford truck?

FOUND IT! I had checked Fuse #6 under the hood which was suppose to be for the alternator and it was fine, but I never checked #7 (secondary alternator) because my truck isnt equipped with the secondary alternator. However I pulled #7 today (5 amp) and it was blown. Replaced it and the light went out.

Why does the battery light come on when you lose power steering?

Typically the battery light comes on when the alternator is not providing electrical power to meet demands of the vehicle. That you lost power steering assist along with the battery light coming on, leads me to think the one common thing between them – the serpentine belt drive system – is at fault.

What kind of battery does a Ford PowerStroke have?

My multimeter reads 13.5v on both batteries with the truck off, 12.5v on. Replaced the alternator, still same results. What else can I check to get this stupid light off???

What does it mean when your battery light comes on?

My car has an automatic transmission. Typically the battery light comes on when the alternator is not providing electrical power to meet demands of the vehicle. That you lost power steering assist along with the battery light coming on, leads me to think the one common thing between them – the serpentine belt drive system – is at fault.

Why does the battery light come on when the engine is off?

When you first turn on your car with the engine off, the battery light will illuminate and this is normal. If the battery light comes on while the engine is running and the vehicle is being driven, this indicates a problem with the charging system.

What to do when your battery light comes on while driving?

If the battery light comes on while the engine is running and the vehicle is being driven, this indicates a problem with the charging system. Step 1: Turn off everything that draws power.

When does the battery warning light come on?

May 25, 2016. The battery light or charging warning light, available on the dashboard of your car, indicates malfunctioning or poor charging of the battery. This light illuminates whenever the charging system does not charge the battery with a voltage above approximately 13.5 volts.

Why is the battery light still on after a new alternator?

So, now truck has new alternator and battery BUT battery light is still staying on. I had them check both and they said, new battery and alt showing good. I know all of the connections are tight and I checked the fuses inside the truck and all are good.

Why is my battery light flickering on and off?

(Flickering lights, dead/low batteries, etc.) If you’re sure the batteries are OK, and you’ve changed the alt already, I’d be giving All the connections and related wiring a real good look next (especially the alt plug) for signs of corrosion. FOUND IT!

Why does the battery light go off when the GPS is on?

Actually, the way the system works is the PCM switches the alt OFF during the times the GPs are On. So, for the first min or two you won’t see anything over batt voltage so the alt is being saved from being overloaded trying to recharge the freshly cranked-down batteries AND the load of the GPs (over 150A) Good catch!

My multimeter reads 13.5v on both batteries with the truck off, 12.5v on. Replaced the alternator, still same results. What else can I check to get this stupid light off???

What causes a 13.5v battery light when the engine is running?

A static 6 cell 12v battery (like we all have) shouldn’t be capable of producing 13.5v… If you’re seeing 13.5 with the engine running and 12.5 OFF, that makes sense and actually shows the alternator is doing something …

Why is the battery warning light still on on my Ford truck?

This all started after the pickup blew a high pressure oil line and was replaced. The mechanic checked everything and can’t locate any possible signs of a problem. The battery warning light is still lite up when the ignition switch is turned on. The batteries drain when the truck sits. has to be charged up or jumped to start it.

What causes a battery light to go off in a car?

On another vehicle found an area in the Positive wire where it was burnt and started to melt was causing the battery light to go off. I’d probably Next clean grounds, including frame grounds and battery cables. Next would be pull the batteries and alternator and take to a parts store to test.

Why is the battery light on on my 4.6L?

Broken wire coming off the alternator. It may not look broken but it could be broke inside the insulation. That was the story with my 4.6L. The battery light would come on and off, wiggled the single grey wire and it would turn the light on and off.

Why is the battery light on but charger is off?

The battery light is on but the voltmeter says 13.5 to 14.5 volts depending on the engine revs. When engine is off the volts drop to about 12. My mechanic says that the alternator must be charging – but why is the light on? Assuming that the voltmeter is correct and reads 13.5v to 14.5v, what could be the problem?

Why does the battery warning light come on after replacing the alternator?

A relatively common “side-effect” of replacing a battery and/or alternator in a car is to have the voltage (battery) warning light come on. This is especially true in late-model vehicles with their more sophisticated internal diagnostic systems.

What happens when you change the battery in a car?

Why does the battery warning light stay on?

The battery warning light is still lite up when the ignition switch is turned on. The batteries drain when the truck sits. has to be charged up or jumped to start it. Take the alternator to a alternator shop have them test it.

Why does my Ford PowerStroke battery not charge?

It was a fuse in fuse box under the hood. That caused the battery system to not charge. Someone before I owned the truck put a 5 Amp fuse instead of the 10 fuse that was required. All the fuses were checked under the hood several weeks ago and they were all OK.

What causes a battery warning light on the dashboard?

See how you can fix the battery warning light on dashboard with this five problem that you can look at. While the battery light might seem like there is a battery problem, but in fact there could be other numerous issue causing the battery light to activate. To see what is really wrong with the car see this video for things you can check.

Why does the battery light come on after the alternator is replaced?

This would make the Battery Light come on. It is also possible that there is a problem with the fusible link or the alternator fuse for the charging system.

What was the problem with my alternator going out?

I was thinking that the problem was probably the alternator and as I was trying to get to my house the instruments began to go out. First the tach, then the speedometer, and then the accelerator pedal was unresponsive. I was able to limp for a little while, but it eventually totally quit.

What should the battery reading be on a Ford F150?

With your F150 turned off, you’ll connect the negative side of the meter to the negative battery post or wire. Touch the positive side of the voltmeter to the positive battery wire. With the engine off, you should get a reading somewhere between 12.0 volts and 12.6 volts. Now that you have a baseline, it’s time to turn the engine on.

What to do if your F150 battery post is corroded?

If the battery post is really corroded, it won’t be able to do its job of sending the voltage to and from the battery efficiently, and your F150’s battery light will turn on. It only takes a second to check it out. A battery post cleaner or wire brush can clean it up in no time.

Why does the battery light come on on my 2007 Ford F150?

This 2007 Ford F150 came in with the complaint that the battery light would come on about 30 seconds after the engine was started. The voltmeter in the dash indicated the alternator was charging. Checking the system with my charging system analyzer found the charging voltage was good at 14.23 volts and the amperage was at 14 amps.

Why does my Ford PowerStroke have a red battery light?

All the fuses were checked under the hood several weeks ago and they were all OK. What caused the fuse to blew, only suspect was when one of the high pressure oil lines blew must have shorted something out in the charging system.The was oil everywhere. So now I got two new heavy duty commercial grade Interstate batteries and a new alternator.

Why is the battery light on in my Ford truck?

When running at the back to the alternator cold and running getting 13.5 – 13.8. Battery light on. Drive a while stop the truck turn it off etc. Turn the truck back on then getting 12.5V won’t go above that and the battery light remains on. The next day very same thing.

When does the battery light come on on a diesel?

The battery light does not come on immediately. So voltage at battery not running 12.5 Turn key to on. Glowplugs on voltage at 12.0. Turn to start voltage drops to 11.8 and engine starts just fine. After 30 seconds battery light comes on and voltage is only 13.0.

Where is the battery light and p0625 code?

There is one LARGE red wire by itself which is the main battery lead. The small red wire is in the 3-wire connector at the alternator. Single. I cleaned up all connections to the battery terminals. Inspected all wires. All look good. But still no resolution. Any Resolution? Getting the same battery light and code.

Can you replace batteries on a Ford truck?

The truck sits more than anything as it’s not my daily driver however i would like to replace the batteries with something dependable. I’ve had a bad experience with Motorcraft batteries from Ford, and the dealership experience is even worse.

Why does the battery warning light keep coming on?

If you drive more than twenty or thirty minutes battery light comes on and stays on. After another few minutes all warnings lights flash and all gauges freeze, then power steering goes out and car dies completely. Had new alternator tested and its fine just put new battery in. Do not know what else to do.

This would make the Battery Light come on. It is also possible that there is a problem with the fusible link or the alternator fuse for the charging system.

What should I do if my Battery Light is on?

Battery light on. Drive a while stop the truck turn it off etc. Turn the truck back on then getting 12.5V won’t go above that and the battery light remains on. The next day very same thing. Voltage is at 13.5 with battery light on drive and do what i need to get to where I’m going, shut the truck off then get back in and turn it on 12.3- 12.5V max.

When does the battery warning light go off?

The battery warning light in your vehicle turns on when you turn the ignition key to the “on” position. As soon as you start the engine, the light goes off and remains off until you stop the engine again — unless there’s a problem.

Can a dying battery cause a check engine light to come on?

A dying, fading car battery means low voltage. As a result, your car’s computer, which is responsible for reporting error codes, is also receiving low voltage. An error code will be generated which will in turn trigger the Check Engine Light or even the Battery Charge Warning Light to display.

Why does the battery light flicker when the engine is idle?

It means your battery has taken over to keep the electronics working. As soon as the output from the alternator drops to a certain fairly low level, the battery light flickers. As simple method to check if it is the alternator is to park the vehicle and let the engine idle, and the light gets a little brighter.

Why does my Ford Expedition have a battery warning light?

“Island cars” tend to have problems based on inactivity. I’d put some miles on the car and see if it fixes itself. Hop on the ferry, drive to Cleveland, and watch the Indians afternoon game. Put some heat in the whole system. Update.

What kind of battery does Ford Expedition have?

It is a 2012 Expedition with a 5.4 L engine. I tested the battery with a load tester, and it was good. Also the load tester after starting tested in the green, so 14 volts. My volt meter on the dash is straight up in the middle where it should be, and appears to be working.

Why does the battery light not come on when the engine is running?

Since I noticed that the battery light does not come on when the battery is hooked to an external charger, and without the charger the alternator, while the engine is running, gives 14.2 volts to the battery, I thought that maybe there is a ground issue with the alternator.

Discussion in ‘ 3rd Gen – 2007 – 2017 ‘ started by Zellerj, Aug 15, 2019 . Yesterday my battery warning light came on, and I pulled into an Autozone for analysis. The Autozone tech said the battery was good – passed a load test, and the alternator was supplying 14.2 volts to the battery under load and at idle.

Why is the light blinking on my Ford PowerStroke?

In April I towed a 34′ trailer to Talladega and noticed the light blinking. No towing issues at all. A few days ago on the way home from work, it was holding out longer (RPM’s) before shifiting into OD. Last night on the way to a dinner, it popped right out of OD and would not pull in any gear (even reverse).

When does the overdrive off light start flashing?

The overdrive off light on the gear selector lever where the overdrive off button is located starts flashing when my truck gets up to 30-40 mph. Shifting is normal the overdrive off button works fine when I push it it goes to 3rd gear and or out of overdrive and the rpms increase as usual.

What causes a battery light to come on?

I have the same issue, New batteries, new alternator, new 2 wire pigtail, and fuses are good. battery light in dash stays on. I have hooked up mutimeter to all electrical components individual and there reading are within spec. battery light came on when my original alt. was failing and it has been on since changing all issues.

What kind of alternator does a Ford PowerStroke use?

Alternator replaced with a brand new Motorcraft 135 amp output from Ford.All terminals and cables look good and connections are clean as a whistle. Any suggestions y’all.

What causes a battery light to go out in a Ford truck?