Wipers will not operate

First, check to see if there is power to the wiper motor. If there is, make a jumper wire directly from the motor to ground on the battery to see if that is the problem. As far as the dash lights, create a new ground from the body (firewall) to a known good ground to see if that repairs the problem. If none of the above suggestions help, consider having the body control module tested. Since the items worked before you repaired a ground issue, something is telling me you simply created a new ground problem for other components.