Push the black wire firmly onto the terminal on the back of the ignitor button where it is mounted on your grill control panel, using needle-nose pliers. The wire is installed with a metal clip that connects to the post on the back of the ignitor.
Push the other end of the wire onto the ignitor module, which is mounted below your grill under the burner. The ceramic ignitor cylinder resembles a spark plug.
Rub a small piece of steel wool over the tip of the ignitor under the grill to remove any grease or dirt that could prevent it from operating properly.
Turn the knob on the gas tank clockwise to shut off the fuel while testing the ignitor.
Press the red ignitor button on the front of your grill control while peering below the grill to watch the ignitor beneath the burner. With normal operation, you should see a spark flick off the tip of the ignitor when the button is fully pressed; it should make a sharp clicking sound. If these tests fail to produce a spark, the ignitor may be bad. Replacement ignitor assemblies are available at grill shops and hardware stores.