Persistent battery light on my dash

2007 AUDI A4

133,000 MILES • 4 CYL • TURBO • 4WD • AUTOMATIC

BRINAGINUS

MEMBER
3 POSTS

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

Sep 11, 2019 at 11:29 AM

SCGRANTURISMO

✓ASE Certified 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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Sep 11, 2019 at 11:02 PM