What are the effects of a damaged engine wiring harness on a car?
3 Answers
The effects of a damaged engine wiring harness on a car are: inaccurate signals causing the vehicle to fail to start or potentially leading to a fire. A wiring harness refers to a component formed by crimping contact terminals made of copper material with wires and cables, then molding an insulating body or adding an external metal casing, bundled together to create a circuit connection. The functions of a wiring harness are: 1. Reducing circuit impedance to improve system circuit efficiency; 2. Providing unique flame-retardant properties to enhance the vehicle's high-temperature tolerance; 3. Offering superior penetration capabilities to effectively repair circuit cracks; 4. Forming a protective film on the surface and connectors to isolate moisture, resist oxidation, and prevent rust.
Last time my car's engine wiring harness broke, it was a real headache. The car suddenly stalled while driving, nearly causing an accident on the highway, and the tow truck cost me several hundred dollars. This thing controls all the engine's sensors and actuators, like fuel injectors and spark plugs. After the wires broke, the car shook violently, a bunch of warning lights lit up on the dashboard, acceleration became rough, and fuel consumption skyrocketed. If not repaired in time, the battery could even over-discharge and die. That experience taught me the importance of regular circuit inspections – don't wait until you're stranded to regret it. You can use a multimeter to check for continuity in the wires, but for a complete fix, you need a professional to replace the wiring harness. Otherwise, it's too risky.
Speaking of engine wiring harness damage, I've learned my lesson the hard way. The impact on the car is extensive. First, it was difficult to start, with a prolonged buzzing sound during ignition but no firing up. Then, the engine warning light stayed on constantly, and acceleration became weak, like an asthma patient. In severe cases, the engine could stall midway. Once, it died at a traffic light, with cars behind honking nonstop—utterly embarrassing. Worse yet, the electronic control system went haywire, increasing fuel consumption by up to 30%. During repairs, we found that the short circuit had also burned out the relay. I recommend everyone pay attention to wire aging, avoid water immersion or tugging, and get voltage tests and replacements at authorized dealerships when necessary. Don't underestimate this small component—it can ruin the entire vehicle's health.
