What protection measures should be taken for the electrical system of heavy-duty trucks during rainy season driving

In rainy, hot and humid areas overseas, the failure rate of heavy truck electrical systems will significantly increase. Rainwater infiltration, splashing of mud and water on the road surface, and long-term dampness of the chassis can easily cause problems such as plug oxidation, circuit short circuit, sensor failure, and lighting malfunction. Most electrical failures are not caused by component quality issues, but by inadequate protection during the rainy season. Electrical fault diagnosis is tedious, and downtime has a significant impact, especially with limited overseas maintenance resources. Taking advance measures for electrical protection during the rainy season is key to ensuring stable vehicle operation and reducing maintenance costs. Ensure waterproof and anti-corrosion protection for all plugs and connectors in the vehicle. Heavy truck chassis sensors, braking systems, taillights, and trailer connectors have a large number of plugs that are exposed for a long time. During the rainy season, mud and water are prone to seep into the gaps, causing pin oxidation, corrosion, poor contact, signal disorder, and occasional malfunctions. Daily maintenance should focus on checking whether various electrical plugs are loose, whether the rubber rings are aging and falling off, spraying insulation protective agents on exposed plugs, and sealing gaps. For high-frequency damp parts such as trailer sockets, ABS plugs, and chassis sensing plugs, waterproof sheaths can be installed to prevent long-term rainwater intrusion. Standardize car washing and water wading operations during the rainy season to avoid damage caused by human water ingress. During the rainy season, when the vehicle is in muddy conditions, many drivers are accustomed to high-pressure direct charging towards the chassis and electrical concentrated areas at the front of the vehicle. The high-pressure water flow is easily able to break through the plug sealing layer, pressing mud and water into the interior of the line, causing hidden water accumulation and corrosion. When driving through water, if the water depth exceeds the position of the chassis harness, it is easy to soak electrical modules and connectors. During the rainy season, try to avoid high voltage directly hitting electrical interfaces. After entering water, check and dry key plugs in a timely manner, clean up accumulated water and dirt, and prevent long-term moisture and mold damage to the circuit. Strengthen wire harness protection to prevent wear, water ingress, and short circuits. Rainwater during the rainy season can soften the outer skin of the wiring harness, making it easy for slightly worn circuits to break down, short-circuit, and leak electricity when exposed to water. Focus on inspecting the bending of the frame, the friction position of the chassis, and the wiring harness near the suspension to see if the outer skin is cracked, worn thin, or aged. Re fix the loose suspended wire harness and install corrugated pipe protection to avoid damage caused by bumps and friction during driving. At the same time, tidy up the messy lines to prevent rainwater accumulation and mud and water accumulation in the interlayer of the wiring harness, which can cause long-term corrosion and aging. Take good care of the battery and electrical system to prevent moisture damage. During the rainy season, the air humidity is high, and the battery pile head is prone to moisture and oxidation, resulting in white frost and poor contact and weak starting. Long term rainy driving can cause unstable generator load, leading to abnormal voltage and disrupted electrical operation. Regularly clean the battery pile head, apply protective grease to prevent oxidation and corrosion, check the fastening of the battery harness to avoid moisture and looseness that may cause circuit faults. At the same time, check the sealing of the fuse box to prevent water and moisture from causing fuse burnout and circuit breakage. Timely handling of potential faults and hazards to prevent the problem from escalating. Electrical faults during the rainy season are often caused by chronic corrosion, initially manifested as flickering lights, unstable sensor signals, and occasional errors. If not dealt with in a timely manner, they can evolve into serious faults such as complete short circuits and module burnout. The fleet needs to develop a habit of conducting inspections after rain, targeting issues such as electrical sealing, line wear, and plug oxidation, to achieve early detection and protection.