{"id":3558,"date":"2023-03-28T16:16:24","date_gmt":"2023-03-28T07:16:24","guid":{"rendered":"https:\/\/www.naccorporation.com\/en\/?post_type=electrical-knowledge&#038;p=3558"},"modified":"2023-04-04T11:27:42","modified_gmt":"2023-04-04T02:27:42","slug":"cable-harness-defects-cable-harness-testing-for-a-loose-female-terminal","status":"publish","type":"electrical-knowledge","link":"https:\/\/www.naccorporation.com\/en\/learning-center\/electrical-knowledge\/3558","title":{"rendered":"[Cable &#038; Harness Defect] Cable Harness Testing for A Loose Female Terminal"},"content":{"rendered":"<div class=\"c-movie\">\r\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/WI0LuxMo_Go\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\r\n<\/div>\r\n\r\n\r\n<h3>Why does female terminal loosening occur?<\/h3>\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2023\/03\/1-1_Loosening-female-terminal-and-reduced-springiness.png\"  alt=\"Loosening female terminal and reduced springiness\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2023\/03\/1-2_Inaccurate-fixtures-may-damage-the-connectors-and-terminals.png\"  alt=\"Inaccurate-fixtures-may-damage-the-connectors-and-terminals\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2023\/03\/1-3_Deformation-of-tarminals-occur-by-reworking.jpg\"  alt=\"Deformation-of-tarminals-occur-by-reworking\" width=\"280\" height=\"157.5\" padding=\"20\"><\/br>\r\n<\/br>\r\n\r\n<p>Loosening female terminal occurs during the handling and fixture mating.\r\nNarrow-pitch connectors are less strong and more delicate.\r\nHuman error or mis-mating caused by inaccurate fixtures may damage the connectors and terminals.\r\n\r\nTerminals are damaged by prying.\r\nDeformation occurs by reworking because force is applied to the terminals to open them.\r\nThe spring of the terminal that stabilizes the contact becomes less effective.\r\nThere is also a risk with a buzzer tester.\r\nForced touch with the probe will cause deformation.<\/p>\r\n\r\n<div class=\"c-spacer--s\">\r\n<h3>Does continuity exist even if loosening terminal occurs?<\/h3>\r\n\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2023\/03\/2-1_The-spring-of-the-terminal-that-stabilizes-the-contact-becomes-less-effective.png\"  alt=\"The-spring-of-the-terminal-that-stabilizes-the-contact-becomes-less-effective\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2023\/03\/2-2_Forced-touch-with-the-probe-causes-deformation.jpg\"  alt=\"Forced-touch-with-the-probe-causes-deformation\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2023\/03\/2-3_Case-that-product-has-passed-wiring-testing-but-the-manufacturer-complains-defects.png\"  alt=\"Case-that-product-has-passed-wiring-testing-but-the-manufacturer-complains-defects\" width=\"280\" height=\"157.5\" padding=\"20\"><\/br>\r\n<\/br>\r\n\r\n<p>Even if a loosening terminal occurs, continuity is still present in the static state because the metals are touching each other.\r\nHowever, the cable harness is not performing to its full potential.\r\nThe mating force becomes small, and momentary disconnection occurs due to vibration or shock.\r\nThere are cases in which a product has passed wiring testing and has been shipped, but the manufacturer complains that the product is defective.\r\nThere is a possibility of momentary disconnection due to an unstripped cable\r\nA momentary disconnection defect in the automotive harness will cause the dashboard camera and audio system to stop, and the lamps and side mirrors to malfunction.\r\nIn the worst case, the vehicle may not be able to drive.\r\nSimilarly, the detection of momentary disconnections is important in industries such as railroads, motorcycles, telecommunications, and aerospace.\r\n<\/p>\r\n\r\n<\/div>\r\n\r\n<h3>What is the test to prevent the outflow of products with defective terminals??<\/h3>\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2023\/03\/3-1_It-is-not-easy-to-introduce-X-ray-testing-into-mass-harness-cable-production.png\"  alt=\"It is not easy to introduce X-ray testing into mass harness cable production\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2023\/03\/3-2_momentary-disconnection-testing-for-detecting-cable-harness-defects.jpg\"  alt=\"momentary disconnection testing for detecting cable harness defects\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2023\/03\/3-3_nac-CORPORATIONs-testers-are-capable-of-momentary-disconnection-testing.jpg\"  alt=\"nac CORPORATION's testers are capable of momentary disconnection testing\" width=\"280\" height=\"157.5\" padding=\"20\"><\/br>\r\n<\/br>\r\n\r\n\r\n\r\n<p>It is not easy to introduce X-ray testing into mass production inspection processes from the viewpoints of cost and tact time.\r\nTherefore, it is best to confirm continuity under actual vibration with momentary disconnection testing by cable harness testers.\r\nAfter passing the wiring testing, the momentary disconnection testing is conducted.\r\nDuring the testing, vibration or shock is applied by hand, hammer, or vibrator.\r\nThe direction of the shock is specified by the standard.\r\nIt should be considered in accordance with the item to be tested.\r\n\r\nMating with a fixture requires precision and careful operation.\r\nChecking with a buzzer tester also requires a person to directly touch the terminal with a probe, which may cause unintended deformation.\r\n\r\nnac CORPORATION's testers are capable of momentary disconnection testing.\r\nPlease make use of our proven testers for quality improvement.<\/p>\r\n\r\n\r\n","protected":false},"author":19,"featured_media":3559,"menu_order":7,"template":"","meta":[],"electrical-knowledge-cat":[127,155],"electrical-knowledge-tag":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3558"}],"collection":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge"}],"about":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/types\/electrical-knowledge"}],"author":[{"embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/users\/19"}],"version-history":[{"count":0,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3558\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media\/3559"}],"wp:attachment":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media?parent=3558"}],"wp:term":[{"taxonomy":"electrical-knowledge-cat","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-cat?post=3558"},{"taxonomy":"electrical-knowledge-tag","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-tag?post=3558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}