ABS and slip light control lights on after working on water pump and timing?

It sounds like you pulled out the wiring or disconnected an ABS wheel speed sensor. I would raise the front of the car up and look at the leads for the ABS wheel speed sensors to make sure they are connected here are the locations.

This guide can help:

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

Also, if the sensors are in good shape let's run the ABS codes by following this guide:

https://www.2carpros.com/articles/anti-lock-system-testing-and-repair-abs

Here are the locations for the sensors, front and rear, check out the images (below). Please upload pictures or videos in your response to any problems so we can see what to help you with.