Patent ID: 6232722
Filing Date: 2001-05-15
Classification: B60D,B60Q

Abstract:
An electrical circuit adapter for use between a towing vehicle lighting system and a trailer lighting system, said electrical circuit adapter comprising:a plurality of vehicle signal inputs which each receive an electrical signal from the towing vehicle lighting system, each electrical signal being representative of the state of a particular towing vehicle lamp;a power supply input connected to a power source for receiving a power input signal;a plurality of three terminal transistors, each of said three terminal transistors having a first transistor terminal coupled to one of said vehicle signal inputs, a second transistor terminal electrically grounded and a third transistor terminal coupled to said power supply input;a plurality of two directional relays, each of said relays having a first relay terminal connected to said third transistor terminal of respective three terminal transistors and coupled to said power supply input and a second relay terminal connected to said third transistor terminal of another of said three terminal transistors and coupled to said power supply input;a plurality of relay contacts, each of said relay contacts being operably connected to one of said relays which control the state of said relay contacts; anda plurality of trailer signal outputs connected to said relay contacts and the trailer lighting system, wherein each of said relay contacts selectively couples said power supply input to one of said trailer signal outputs to provide the trailer lighting system with power free from significant power dissipation and amplification.