An automatic ambient condition controlled daytime running light system for transport vehicles having an emergency brake, navigation lights including headlights with high and low beam filaments and parking lights, a power supply, a headlight switch for turning ON and OFF the headlights and a parking light switch for turning ON and OFF the parking lights, an ignition switch and a starter motor switch, the system comprising, a DRL control circuit having a first input from the ignition and an output to a first switching means connected to the high beam filaments for supplying power thereto, means for connecting said first switching means to the source of power, an NL control circuit, a plurality of ambient condition senors, a second input for connecting the ignition switch and outputs from said ambient condition sensors to said NL control circuit, said NL control circuit having an output connected to a second switch means for supplying power to the navigational lights, and output means from said NL control circuit connected to said DRL control circuit for extinguishing power to said first switch means when said NL control circuit is activated by signals received from said second input. view more

A method for automatically controlling the lighting system for a transport vehicle depending upon time of day and ambient conditions wherein the transport vehicle has navigational lights including headlights with high and low beam filaments and parking lights, a power supply, a headlight switch for turning ON and OFF the headlights and a parking light switch for turning ON and OFF the parking lights, an ignition switch and a starter motor switch and a plurality of sensors for sensing various ambient conditions, and each of the sensors having an electrical output which is activated in response to an ambient condition being sensed, comprising the steps of: a) during daylight hours powering the high beam filaments of the vehicle headlights at reduced power when the ignition switch is ON, the starter motor OFF, and the plurality of sensors outputs is in an ambient FALSE state; b) automatically terminating power to the high beam filaments whenever one of the plurality of sensors senses a condition placing the output therefrom in a TRUE state with the ignition in an ON condition and the starter motor switch in an OFF condition and simultaneously supplying power to operate the navigational lights at a normal power level; and c) automatically re-energizing the high beam filament at a reduced power level and extinguishing the navigational lights when all the sensors outputs are in a FALSE state and the ignition switch is in an ON condition, the starter motor switch is in an OFF condition and the headlight switch is in an OFF condition. view more

The method of claim 24 in which during daylight hours powering the parking lights when the ignition switch is ON and the starter motor is OFF.

A method for automatically controlling the lighting system for a transport vehicle depending upon time of day and ambient conditions wherein the transport vehicle has navigational lights including headlights with high and low beam filaments and parking lights, a power supply, a headlight switch for turning ON and OFF the headlights and a parking light switch for turning ON and OFF the parking lights, an ignition switch and a starter motor switch, a parking brake indicator electrical output, and a plurality of sensors for sensing various ambient conditions, and each of the sensors having an electrical output which is activated in response to an ambient condition being sensed comprising the steps of: a) during daylight hours powering the high beam filaments of the vehicle headlights at reduced power when the ignition switch is ON, the starter motor OFF, the parking brake indicator output in a FALSE state, and the plurality of sensors outputs in a FALSE state; b) automatically terminating power to the high beam filaments whenever one of the plurality of sensors senses a condition placing the output therefrom in a TRUE state with the ignition in an ON condition and the starter motor switch in an OFF condition, the parking brake indicator output in a FALSE state, and simultaneously supplying power to operate the navigational lights at a normal power level; and c) automatically re-energizing the high beam filament at a reduced power level and extinguishing the navigational lights when all the sensors outputs are in a FALSE state and the ignition switch is in an ON condition, the starter motor switch is in an OFF condition the parking brake indicator output in a false state, and the headlight switch is in an OFF condition. view more

An automatic ambient condition controlled daytime running light system for transport vehicles having an emergency brake, navigation lights including headlights with high and low beam filaments and parking lights, a power supply, a headlight switch for turning ON and OFF the headlights and a parking light switch for turning ON and OFF the parking lights, an ignition switch and a starter motor switch, the system comprising, a DRL control circuit having a first input from the ignition and an output to a first switching means connected to the high beam filaments for supplying power thereto, means for connecting said first switching means to the source of power, an NL control circuit, a plurality of ambient condition senors, a second input for connecting the ignition switch and outputs from at least one of said ambient condition sensors to said NL control circuit, said NL control circuit having an output connected to a second switch means for supplying power to the navigational lights, and output means from said NL control circuit connected to said DRL control circuit for extinguishing power to said first switch means when said NL control circuit is activated by signals received from said second input. view more

An automatic ambient condition controlled daytime running light system for a transport vehicle having an emergency brake, navigation lights including headlights and parking lights, a power supply, a headlight switch for turning ON and OFF the headlights and a parking light switch for turning ON and OFF the parking lights, an ignition switch and a starter motor switch, the system comprising, a DRL control circuit having a first input from the ignition and an output to a first switching means connected to the headlights for supplying power thereto, means for connecting said first switching means to the source of power so as to supply power at a reduced level to said first switch means and thus to the headlights, an NL control circuit, at least one ambient condition sensor, a second input for connecting the ignition switch and outputs from said at least one ambient condition sensor to said NL control circuit, said NL control circuit having an output connected to a second switch means for supplying power to the navigational lights, and output means from said NL control circuit connected to said DRL control circuit for extinguishing power to said first switch means when said NL control circuit is activated by signals received from said second input. view more

A method for automatically controlling the lighting system for a transport vehicle depending upon time of day and ambient conditions wherein the transport vehicle has navigational lights including headlights and parking lights, a power supply, a parking brake, a headlight switch for turning ON and OFF the headlights and a parking light switch for turning ON and OFF the parking lights, an ignition switch, a starter motor switch and at least one sensor for sensing an ambient condition, and the at least one sensor having an electrical output which is activated in response to the ambient condition being sensed, comprising the steps of: a) during daylight hours powering the vehicle headlights at reduced power when the ignition switch is ON, the starter motor OFF, and the at least one sensor output is in a FALSE state; b) automatically terminating power at a reduced level to headlights whenever the at least one sensor senses the ambient condition placing the output therefrom in a TRUE state with the ignition in an ON condition and simultaneously supplying power to operate the navigational lights at a normal power level; and c) automatically re-energizing the headlights at a reduced power level and extinguishing the navigational lights when said at least one sensor output is in a FALSE state and the ignition switch is in an ON condition, and the headlight switch is in an OFF condition. view more