I have changed my alternator an the battery light stays on when i start the car and the abs lights stays on?

First, does the alternator you put in work? ABS is a whole different system, and should be diagnosed separately. More information is available if you give us YEAR, MAKE, MODEL.
I have changed my alternator an the battery light stays on when i start the car and the abs lights stays on?
Do a scan check and see if any codes . Check for blown fuses too.
I have changed my alternator an the battery light stays on when i start the car and the abs lights stays on?
You can also try disconnecting the battery to reset it.

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