Q: New alternator works fine. Test is fine but battery light in dash is still on. How come?

asked by on

2004 toyota tundra replaced alternator because it failed. Did test after new install, everything is up to specs but battery light in dash is still on. Can you tell me what it means?

Hello there, the battery light on your 2004 Toyota Tundra is there to warn you that the alternator output is out of specifications. If the alternator output is to low or high, the light will be on. The alternator output will need to be tested with a load test to determine if other issues are present. A qualified technician, such as one from YourMechanic, will be able to diagnose the battery light and perform any repairs that are required.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. New alternator works fine. Test is fine but battery light in dash is still on. How come?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Instrument cluster shuts off intermittently while driving

There are two fuse boxes on the vehicle. One is inside of the firewall usually located in or around the dashboard. Have you checked this fuse box and the fuse box in the engine compartment? The dash cluster itself may...

Q: Lights not working after battery change.

The systems share two different fuses. The 30amp headlight fuse and the 15amp meter fuse. These two fuses may be blown and would need to be checked before further diagnostics would be done. If your bad battery was jump started...

Q: 2000 ford excursion v10 altinateor replaced still not charging, can drive 45 min before battery dies and truck stops running

Hello, thank you for writing in. This is going to be a process of elimination. To start, the charging system may be having issues with the battery or the alternator. Both should be tested to make sure they are working...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.