Extendable component warning system comprised of sensors for detecting raised or lowered positions of extendable components, hardware and software for internally alerting the driver to the positioning of the extendable component; Position monitoring and signaling systems comprising hardware, software, sensors, electronic signals and display indicators for vehicles and heavy equipment using electrical signals to indicate the position of an extendable component on vehicles and heavy equipment; Position monitoring and signaling system for heavy equipment and vehicles comprised of sensors and software for monitoring the position of extendable components on the equipment and vehicles, and devices for notifying the user of this position data; Devices consisting of computers, sensors and display indicators for monitoring the position and location of extendable components on vehicles and heavy equipment; Safety alarm systems for vehicles and heavy equipment for warning against raised position of extendable components on vehicles