Trailer light detector applicable to multiple types and detection method thereof

A trailer light detector applicable to multiple types, comprising:

• a housing component including a lower shell (11) and an upper shell (12) fixedly connected by assembly screws (13), wherein a handle holder (14) and a handle (15) detachably connected thereto are provided on a top of the housing;
• a circuit board component (2) disposed inside the housing, including a power module (204), a detection branch (209), a relay (210), a remote controller (211), an IP2326 chip (206), an STC chip (207), an antenna (21), a GND ground terminal (205) and a circuit module (208), wherein the power module (204) is electrically connected to a battery module (203), the detection branch (209) is connected to a trailer light interface through the relay (210), and the GND ground terminal (205) is fixedly connected to a ground circuit of the circuit board component (2) to provide stable ground protection;
• an operation component including a switch key (22), a plurality of keys (23) and a charging port (24) disposed on a surface of the housing, wherein the plurality of keys (23) are in signaling connection with the STC chip (207);
• and
• an interface component including a small socket (3) and a large interface (4);
• wherein a small socket protection cover (31) is disposed on an outer side of the small socket (3) and fixed by an anti-drop connection strip (32);
• and a large interface protection cover (41) and a protection cover base (42) are disposed on an outer side of the large interface (4).