Battery Light On

[jeffsk8r6]

My battery light won’t stop coming on I’ve replaced alternator and battery I have checked voltage in the wires and they seem good but light still on what is the problem here

 

[Jeff Hachmann]

I have the same thing happening, battery light comes on and lights dim, fan slows. Latest is there is a clicking sound in the left dash when I press the brakes. I'm guessing there is a grounding problem but have no idea where to start.

 

[Nick Mann]

Did you scan the PCM for charging system codes?

 

[Jeff Hachmann]

No, guess I should go to the parts store and have them scan it.
Thanks for the suggestion.

 

[Nick Mann]

If you check the voltage at the back of the alternator and at the battery? Are they the same?

 

[Jeff Hachmann]

I saw a post elsewhere where a guy replaced the negative battery cable even though his looked good and it fixed the problem. I just disconnected the smaller wire to the body, cleaned the connections and the problem disappeared.

 

[Nick Mann]

You should remove and clean every ground points you can find. Around the engine bay you have a few. Remove your kick panels in the cab. You have a few there also.

Try the wiggle test with all the connections. Did you scan the PCM? If it is a flooded lead battery. Check the voltage at each cell if you can.

Good luck