what are the steps to replacing the outter tie rod on the left side.

The tie rod "snapped", was it hit? What caused the part to fail? Address that before any attempt to repair, the tie rods do thread together and the toe angle is adjusted by the length of the inner and outer tie rod assembly. changing the outer tie rod end could be a DIY job. The inner tie rod may need special tool to prevent damage to the steering gear. After the parts are replaced the front end alignment needs to be set. Thanks, Kern Kern's Complete Automotive 253.538.1441