Q: How to remove and install a headlight switch on Lincoln Town Car?
A: Disconnect the cable from the negative battery terminal. For the thumbwheel type, pry up on the cluster and remove the switch lens. Remove the lens retaining screws. Disconnect the connector and remove the switch. Installation is the reverse of removal. For the detachable shaft type, reach under the dash and press the release button on the bottom of the switch, then withdraw the knob and shaft from the switch. Remove the instrument cluster bezel. Remove retaining nut, then lower the switch and bracket, disconnect the electrical connector and separate the switch from the bracket. Unscrew the retaining collar and push the switch back through the dash, lower the switch, cut the tie strap then disconnect the electrical connector and separate the switch from the bracket. Place the new switch in position on the bracket and secure it with the nut. Insert the knob and shaft into the switch. The remainder of installation is the reverse of removal. For the detachable knob type, detach the headlight switch knob by using a pointed tool to lift the release tab at its base. Use a pointed hooked tool to lift the retaining clip, then pull the knob off the shaft. Remove the switch bezel. Remove the retaining screws and withdraw the switch and bracket from the instrument panel. On the knob-type switch, remove the bracket bolts and withdraw the switch and bracket as an assembly. On 1997 and later models, the instrument cluster panel must be removed first. Disconnect the connector, then remove the nut and separate the switch from the bracket. Installation is the reverse of removal.