ABS warning light, brake wear light.

[chainreaction31]

Ok, I just got a replacement engine installed after a bearing failure in my 2001 S and the problem I'm having now is this.

The ABS and brake wear lights are on and the brakes are incredibly unresponsive. The ABS does not work at all, I know because after a few minutes some guy decided he liked my lane better than his... hit the brakes, lots of smoke from the tires and some sliding later, you get the picture. I don't think the brakes are worn either, because I had them redone about a month before my car died. Does anyone know what the issue might be? I'm hoping it's just something that wasn't hooked up right because the car had to sit for almost 8 months and obviously lots of things were disconnected when the car was fixed. Another thing, is it possible that something was reset because it sat for so long with zero battery power? Thanks in advance for any suggestions.