Before servicing the A/C heater control, disconnect the negative
Battery Cable. Remove the control bezel from the dormer and take out the control, then detach the control wiring harness. Take out the screws that are used to mount the control. The control goes on the bezel and you secure it into place with the included mounting screws. Slot the control harness onto the control, line up the bezel with the dashboard, press the bezel and control together, but don't touch the knobs as you do this to avoid damage. Now, attach the negative battery cable as it was before.