Abstract: An indicator unit is provided to display information to occupants in a motor vehicle. An interface to a communication network provides data required for the specific information being displayed. The indicator unit is adapted to fit into a standard sized aperture found in motor vehicle dashboards, thereby enabling indicators for different operating parameters as desired by the owner to be incorporated into the dashboard of a particular vehicle. An input device also may be provided by which an occupant of the motor vehicle can control operation of the indicator unit.

Abstract: An interchangeable printed circuit board having electrical components is attached externally proximate to the base of a switch to customize switch performance. The circuit board includes openings which slide over and electrically engage the terminals of the switch proximate the base, leaving the remainder of the terminals exposed and available for plug-in or solder electrical connection within an electrical system. The openings may be copper contact members having fingers which engage and electrically connect to the switch terminals.

Abstract: An interchangeable printed circuit board having electrical components is attached externally proximate to the base of a switch to customize switch performance. The circuit board includes openings which slide over and electrically engage the terminals of the switch proximate the base, leaving the remainder of the terminals exposed and available for plug-in or solder electrical connection within an electrical system. The openings may be copper contact members having fingers which engage and electrically connect to the switch terminals.

Abstract: An indicator unit is provided to display information to occupants in a motor vehicle. An interface to a communication network provides data required for the specific information being displayed. The indicator unit is adapted to fit into a standard sized aperture found in motor vehicle dashboards, thereby enabling indicators for different operating parameters as desired by the owner to be incorporated into the dashboard of a particular vehicle. An input device also may be provided by which an occupant of the motor vehicle can control operation of the indicator unit.

Abstract: An indicator unit is provided to display information to occupants in a motor vehicle. The indicator unit is adapted for connection to a communication network and intercepts messages that carry data between other vehicle equipment. A control circuit is programmed to identify the existing network messages that carry the data needed for the information display. The control circuit operates a display device in response to received data. Because the indicator eavesdrops on the network and intercepts existing data messages, other equipment in the motor vehicle do not have to be programmed to communicate specifically with the indicator. This facilitates adding specific indicators to a particular truck.