I pulled the range from the wall and disconnected the power cord. I removed the grates, burner caps and the burners from the cooktop. Using a plastic putty knife, on either side of the range in the front I pushed the retaining clips to allow the cooktop to be raised. I used a short board to keep the cooktop open. I cut the wire leading to the broken igniter and removed the old igniter. I put the new ignitor in the mounting hole. The igniter wire connects to the spark module which is in the back of the range. To access the module I removed three top screws on the backplate(you have to get behind the range) and removed the top access panel. I used the old wire to pull the new wire through to the module. I disconnected the old wire from the module and connected the new one.
Reassembly was easy. I replaced the backplate and screws, lowered the cooktop, replaced the burners, caps and grates. I plugged the power cord back in and slid the range back.