AUTOMOTIVE WIRE HARNESS TESTING
How to Test a Wiring Harness | It Still Works
Testing Voltage: Disconnect the end of the harness that feeds the device. For example, pull out the Testing Continuity: Ensure the power to the harness feeding the device is disconnected.
Testing Automotive Wire Harnesses - ASSEMBLY Magazine
Continuity of HistorySome Test(Er) Questions to AnswerThe Latest and GreatestAutomobiles have always had some level of wiring, but initially manufacturers emphasized troubleshooting rather than testing. That changed by the 1930s, as wiring harnesses became more complex. Wires were tested with a manual go—no-go light system, explains Eric Harter, product manager for Dynalab Test Systems Inc. “The two points of a wire were run through a light bulb for continuity,” says Harter. “If the light came on, it meant current was flowing and the wire was good.” By the 1950s, harn..See more on assemblymagBefore purchasing any tester, a harness manufacturer needs to find out the tester’s capabilities. The most important are voltage, ohms, and component tests the tester can perform. Harness makers also need to consider data logging and traceability. Many testers feature a controller that enables an operator to save and share test data on networks. “To generate test programs, the tester needs to be able to import and process data,” says Kjell Uddeborg, senior software engineer for Cablescan Inc..See more on assemblymagAll three models in Dynalab’s NX series (Solo, Pro and Pro+) are lowvoltage testers designed for continuity and other tests, such as active testing of relays in a harness. The relay is inserted into an output module accessory, which is connected to the tester and serves as the mating fixture. A low-voltage current is then introduced to energize the relay. “This process enables a manufacturer to measure continuity change of the harness when the relay is active,” explains Harter. “It also serve..See more on assemblymagAuthor: Jim Camillo