The infinite switch controlling one of the range top burners failed.
1 - Turned off electricity to the cook top. 2 - Removed the range top from the cutout in the counter. 3 - Removed the smooth top by removing the screws around the perimiter of the smooth top. 4 - Removed the screws securing the corner closest to the dead switch. 5 - Removed the screws holding the channel, onto which the infinite switched were attached, to the frame of the cooktop base. 6 - Removed the dead switch by removing the screws that hold it to the channel. 7 - One by one move the wires from the old switch to the new one. 8 - Reversed the process, 6 - 5 - 4 - 3 - 2 - 1, to put the cook top back together.
All in all the part was an exact replacement and the repair went really well.
The hardest part was taking out original light bulb because screws on shield where hard to unscrew after all this years . The old bulb vent out leaving neck in socket. It took narrow electrical pliers to get neck out .The generic appliance bulb did not fit and had aluminum neck ,not recommended for brass sockets in ovens.Putting new light bulb in was not the problem.
I pulled down the wire around the glass cover. . . Released on end of the wire from its holder being careful to not let the glass cover drop. Unscrewed the bulb and replaced with replacement. Easy, easy.