ABS Light and Battery Light On
Junior Member
Joined: May 2020
Posts: 1
Likes: 0
problem
I replaced my battery about 2 months ago. Then my battery light kept coming on during hard acceleration. Then the battery light stayed on no matter what. I knew I had to suck it up and replace the alternator, so I had it replaced with a new one.
So... everything has been fine for 8 days. However, today, while the truck is running, the ABS light comes on, followed by the battery light. Sometimes the battery light will come on and then the ABS light. I cannot seem to determine a pattern.
Here's the kicker... When this happens, the battery volt meter (one word?) shoots up to H (as high as it will go). The truck does not exhibit any other symptoms. The brakes are working fine and the ABS is NOT kicking in randomly. If it were slick outside, I would try to see if the ABS system is working, but it is not slick. The CEL is not on and does not come on.
Also, this is not happening constantly. It seems to happen under normal acceleration, while in 1st gear (although it may be happening at other times when I'm trying to watch the road haha).
After digging around posts, forums, and the internet, I see this has happened to other people after replacing the battery and alternator. So, I'm hoping this is just a sensor problem or some sort of short. However, none of the posts I have seen detail how to fix this.
I plan to see if AutoZone can read the ABS code(s). I'm thinking the battery voltage is out of range and thus the ABS is shutting off to prevent damage. All I have tried to do so far is disconnect the battery, but that has not helped.
Please let me know if I'm missing something, if there is a simple fix, if I'm doing something wrong, if the mechanic messed up while installing the alternator, etc. I'm also wondering if there could be a short in my amplifier (although no other posts have had this problem).
Truck Specs:
- 2003 F-150 w/ 115,000 miles
- 4.6L V-8
- 2 wheel drive
- Sport model w/ 3.55 gears
- Small amp (760 watts max, but probably using around 250 max) w/ 2 small subs
So... everything has been fine for 8 days. However, today, while the truck is running, the ABS light comes on, followed by the battery light. Sometimes the battery light will come on and then the ABS light. I cannot seem to determine a pattern.
Here's the kicker... When this happens, the battery volt meter (one word?) shoots up to H (as high as it will go). The truck does not exhibit any other symptoms. The brakes are working fine and the ABS is NOT kicking in randomly. If it were slick outside, I would try to see if the ABS system is working, but it is not slick. The CEL is not on and does not come on.
Also, this is not happening constantly. It seems to happen under normal acceleration, while in 1st gear (although it may be happening at other times when I'm trying to watch the road haha).
After digging around posts, forums, and the internet, I see this has happened to other people after replacing the battery and alternator. So, I'm hoping this is just a sensor problem or some sort of short. However, none of the posts I have seen detail how to fix this.
I plan to see if AutoZone can read the ABS code(s). I'm thinking the battery voltage is out of range and thus the ABS is shutting off to prevent damage. All I have tried to do so far is disconnect the battery, but that has not helped.
Please let me know if I'm missing something, if there is a simple fix, if I'm doing something wrong, if the mechanic messed up while installing the alternator, etc. I'm also wondering if there could be a short in my amplifier (although no other posts have had this problem).
Truck Specs:
- 2003 F-150 w/ 115,000 miles
- 4.6L V-8
- 2 wheel drive
- Sport model w/ 3.55 gears
- Small amp (760 watts max, but probably using around 250 max) w/ 2 small subs
Junior Member
Joined: Jun 2021
Posts: 1
Likes: 0
Same issue
I just replaced the alternator and battery on my ‘02 F-150 5.4L and am having the same issues with the battery light and ABS light. Both are on constantly along with some electrical issues. Windows, interior lights, wipers, A/C, defrost, gage cluster, are all working intermittently. Also, when I turn the truck off, something is draining the battery. I had none of these issues before replacing the battery and alternator.
Joined: Jul 2021
Posts: 1
Likes: 0
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A partial list of part types we provide include brake pads, headlights, shock absorbers as well as many more products for your motor vehicle. The AutoParts Shop can help you easily find the right car accessories. A very attractive and simple user interface helps you to shop the parts by Brand, Make, or Part, Year, Model with just a few clicks. Customers can also search the right product with search bar based on Part number, Part, Manufacturer Vendor and almost any combination of these attributes with make, model, and year. We supply these automotive products at best-discounted rates.
Our utmost priority is our client satisfaction. Whether you need a part delivered to your house or business, we ship all parts within one business day if that part is available. You will never be surprised by hidden handling or shipping charges. All our prices are provided upfront. If you are unsure of anything, we are always available via phone, chat, or email to help you with any questions you may have.
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