Testing wiring harnesses
US4689551A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1985 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Sep 5, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/59
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for testing wiring harnesses either during or after the harness fabrication process comprises test points, each of which is connected to a corresponding terminal of the harness. Associated with the test points are a current source, a current sourcing means, a current sink, and a current sinking means. Each current sourcing means and current sinking means comprises a controlled conduction path which is selectively operable to a conductive state or a non-conductive state. The tester operates to test individual circuits of the harness for continuity and shorts. In doing this the controlling conduction paths are selectively operated in accordance with information correlating the wiring harness circuits with the test points. A current sensing means senses the present or absence of current during open and short circuit tests and provides appropriate indicator signals to indicate opens or shorts if such faults are present. The apparatus can also be used to test for resistance and unidirectional conductivity devices such as diodes which may be present in a wiring harness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.