Method and device for detecting automotive harnesses

The invention discloses a method and a device for detecting automotive harnesses. The method comprises the following steps that: a micro-computer is connected with a power circuit, an address decoding circuit, m control output ports and n control input ports respectively; the micro-computer groups standard harnesses and to-be-detected harnesses respectively according to conductivity; the micro-computer selects one harness from an input terminals of the standard harnesses and the to-be-detected harnesses sequentially; the micro-computer applies a low-level signal to one of the standard harnesses and the to-be-detected harnesses through the m control output ports and then applies a high-level signal to the other standard harnesses and the other to-be-detected harnesses; the micro-computer reads and stores response matrixes of the standard harnesses and the to-be-detected harnesses; the micro-computer carries out dimension-reduction operation on the stored two response matrixes and carries out dimension reductio