Patent ID: 6608486
Filing Date: 2003-08-19
Classification: G01R

Abstract:
A test device for testing electrical power of a 12 volt battery of a vehicle having a positive terminal for connection with a positive battery cable and a negative terminal for connection with a negative battery cable, and for indicating a short-circuit in an electrical element of the a vehicle protected by a removable fuse installed in a fuse junction with a positive terminal and a negative terminal, the test device comprising:a. a first incandescent lamp having a positive terminal and a negative terminal; b. a second incandescent lamp having a positive terminal and a negative terminal; c. a first test lead having a first end electrically connected to said positive terminal of said first incandescent lamp and a second end electrically connected to a first test connector; d. a second test lead having a first end electrically connected to said positive terminal of said second incandescent lamp and a second end electrically connected to a second test connector; e. a ground lead having a first end electrically connected to said negative terminal of said second incandescent lamp and a second end electrically connected to a ground connector; f. a circuit breaker having a first terminal electrically connected to said negative terminal of said first incandescent lamp and a second terminal electrically connected to said first end of said second test lead for protecting said electrical clement and said test device from damage; g. whereby when said test device is used for testing electrical power of said battery, said first test connector is connected to said positive terminal of said battery, said second test connector is connected to said positive battery cable removed from said positive terminal of said battery, and said ground connector is connected to an electrical ground or a chassis of said vehicle, such that if said battery has electrical power, both said fist incandescent lamp and said second incandescent lamp will be illuminated, but if said battery has no electrical power, neither said first incandescent lamp nor said second incandescent lamp will be illuminated; and h. when said test device is used for indicating whether there is a short-circuit in said electrical element of said vehicle, said fuse protecting said electrical clement is removed, said first test connector is connected to said positive terminal of said fuse junction, said second test connector is connected to said negative terminal of said fuse junction, and said ground connector is connected to an electrical ground or said chassis of said vehicle, such that if there is no electrical short-circuit in said electrical element, both said first incandescent lamp and said second incandescent lamp will be illuminated, but if there is an electrical short-circuit in said electrical element, said first incandescent lamp will be illuminated but said second incandescent lamp will not be illuminated.