Wiring harness conduction testing apparatus

Claim 2

A wiring harness conduction test apparatus according to Claim 1, wherein said checking change-over circuits includes first and second change-over switches (S 11 , S 12 ,S 21 , S 22 )and first and second power supplies (E 1 ; E ) adapted to be connected to one of the terminals of the connection wires to be tested, by switching of the first and second change-over switches, and a current-blocking element (D 1 ,D 2 ),said operation control program-setting memory circuit (12) having the function of supplying a command signal for switching the first and second change-over switches (S 11 , S 12' S 21' S 22 ) in such a manner as to supply current in accordance with the polarity of the current-blocking element (D 1 , D 2 ).

Claim 3

A wiring harness conduction test apparatus comprising: a processing circuit (7) including an operation control program-setting memory circuit (12) and a plurality of memory circuits (11 1 , 11 2 , 11 3 , ..., 11 n ) for storing predetermined connection modes of wiring harness connector circuits, said processing circuit including a plurality of selection keys in the same number as said predetermined connection mode memory circuits (11 1 , 11 2 , 11 3 , ..., ll n ) for switching an address-setting keyboard (8), a single-wire key (9), a no-wire key (10) by use of which predetermined connection modes can be set independently; a plurality of checking change-over circuits ( 15 1 , 15 2 , 15 3 , ..., 15 n ) for applying current sequentially to the individual connection wires of said wiring harness in accordance with an output signal of said processing circuit (7) thereby to produce a signal indicating the connecting condition of said wiring harness; means for comparing an output signal of said checking change-over circuits (15 1 , 15 2 , 15 3 , ..., 15n) with a predetermined connection mode stored in said memory circuits (11 1 , 11 2 , 11 3 , ..., 11 n ) in accordance with an output signal of said processing circuit (7), and deciding whether the connecting condition of said wiring harness coincides with said predetermined connection mode; and a plurality of indication circuits (16 1 , 16 2 , ..., 16 n ) for indicating the positions of any connection wires of the wiring harness not coincident with said predetermined connection mode, said indication circuits including a start key (13) and a restoration key (14) connected through cables to corresponding ones of said predetermined connection mode-setting memory circuits (11 1 , 11 2 f 11 3 , ..., 11 n ) respectively; and a distributor circuit (18) for distributing said wiring harness circuit including said checking change-over circuits (15 1 , 15 2 , ..., 15 ) among said predetermined connection mode-setting memory circuits (11 1 , 11 2 , 11 3 , ..., 11 n ) by said operation control program-setting memory circuit (12) thereby to collate an output of said distributed checking change-over circuits produced by said processing circuit with the data set in the predetermined connection mode-setting memory circuits, wherein the checking change-over circuits distributed by said distributor circuit are switched, and the output of the checking change-over circuits is collated with the data set in the predetermined connection mode-setting memory circuits, serially for each address of the predetermined connection mode-setting memory circuits according to a program executed by the operation control program-setting memory circuit (12).