In daily Wiring Harness applications, such as: automobiles, outdoor LED screens, agricultural machinery, construction machinery, etc., there are situations in which they are used in rainwater environments, and the waterproof performance of wiring harnesses is very critical. The editor will introduce to you the key control points of the waterproof wiring harness process. 
1.Choose Waterproof Connectors Connectors are a must to provide a secure and reliable connection. Select the advanced waterproof structure design Connector, the waterproof level is greater than or equal to the IPX7 protection level. Select connectors produced by regular manufacturers to ensure strict quality control system, excellent processing and assembly accuracy, and multiple performance testing. To ensure the waterproof performance of the connector.
2. Wire Harness Design Process The selection of the wire diameter should match the connector, and the wire diameter should not be larger or smaller than the specified diameter of the connector. 3.Cable Assembly Production Process 3.1. The waterproof terminal must be crimped with a special crimping die, and the crimped terminal must meet the relevant technical requirements. 3.2. Heat shrink protection of solder joints and connection points: When the wire harness is welded at the iron point, it must be protected by a heat shrink sleeve. The copper wire must not pierce the heat shrinkable tube, and the heat shrinkable tube must be fully wrapped with the copper wire. The heat shrinkable sleeve must meet the relevant technical requirements. 
4. Air Tightness Detection The sealing performance of the waterproof wiring harness is tested by an intelligent sealing detection system. Connect the two ends of the wiring harness to the corresponding tooling, pass in compressed air, and conduct a pressure test to determine whether the sealing performance is qualified. The test standards are as follows: Detection pressure: 20KPa; Inflation time: 10S; Holding time: 5S; Test time: 10S; Pressure loss: ≤0.05KPa; Within the specified time, the pressure loss is less than the specified value, indicating that the sealing performance is good. Meet the requirements of waterproof wiring harness. Product performance is qualified. Many factories conduct electrical performance testing, sealing performance testing, and appearance testing for each waterproof wiring harness. Ensure product quality is qualified. Only through strict waterproof wiring harness design, procurement of outdoor waterproof wire harnesses produced by regular manufacturers, production in strict accordance with the waterproof wiring harness process, and rigorous and thorough quality inspection, can a qualified waterproof wiring harness be produced.
1.Choose Waterproof Connectors
4. Air Tightness Detection