Persistent battery light on my dash

BRINAGINUS

MEMBER
2007 AUDI A4
4 CYL
TURBO
4WD
AUTOMATIC
133,000 MILES

I have changed the battery and the alternator. I’ve had it tested and the new alternator charges the new battery but the light has not turned off. I recently removed to instrument cluster to clean inside but made sure to put everything back the same way. I hope that it didn’t cause this problem and anything helps. Thanks

Wednesday, September 11th, 2019 AT 11:29 AM

1 Reply

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

If your battery is getting charged by your vehicle's alternator and the charge light is staying constantly on, then you probably have a short to power on the blue wire that goes into pin #14 of the green instrument cluster connector. This is the positive wire that goes to the charge indicator warning illumination lamp. In the diagrams down below I have included the wiring diagram for the instrument cluster and pinouts complete with callouts for the the two electrical connectors for the instrument cluster. I have also included a guide for finding shorts to power as well. Please go through these guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

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