2002 cavlier abs light, service light,...

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I just installed subwoofers and an amp in my car. I installed the power wire and had to disconnect my battery. When i reconnected everything and started the car, the abs light, service light and traction light stay on. I tried to disconnect the power wire for the amp and the problem is still there. Just wondering what is wrong.

i know that with a great many vehicles, when the battery is disconnected for a while, the warning lights will come on for a bit until the system resets..its ususally a set number of miles.  does it seem to run ok?

yeah the car seems to run ok.

i would try to drive it around a bit and see if they go away.  if it doesnt go away find someplace that will pull the codes for the CEL and ABS for free.