ABS Light On on 2002 Chevrolet Venture

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I replaced both front wheel bearing assemblys and all was well for 2 days. Then the ABS light came on on the 3rd day. I've checked the connectors at the bearings, and they are still connected. The light doesn't come on until i start to accelerate after starting the engine Sometimes as i start to accelerate the ABS activates briefly before the light comes on. Is there anything else i can check myself? Any help will be appreciated, and thank you in advance.
(2) Answers
Possible bad part, you really need a good abs scanner or gm tech II to tell u which wheel is giving the fault code so you can start looking, alot of times these vehicles have problems further up the harness in the wheel well.