What are the reasons for a complete power failure in the FAW J6?

[MatthewFitz]

The reasons for a complete power failure in the FAW J6 include low battery voltage and insufficient battery charge. Below are detailed explanations and solutions: Low battery voltage: If the battery voltage is too low to power the dashboard and indicator lights normally, it may have already caused data loss. In this case, you need to visit a 4S store for initialization, commonly known as decoding or code matching. Most domestic vehicles can be jump-started, but many still require initialization at a 4S store. Insufficient battery charge: If the battery is completely dead, you can use jumper cables to connect to another vehicle's battery for a temporary start. However, it is best to remove the battery and take it to a battery shop for charging, as a completely dead battery cannot be fully recharged by short-term driving. It requires a longer charging period to restore its capacity. If you have a portable charger, you can charge the battery directly in the vehicle without removing it. Jump-starting procedure: First, open the hoods of both vehicles. Connect the positive and negative terminals of both batteries using jumper cables. Then, start the engine of the functioning vehicle and press the accelerator pedal without load. Finally, attempt to start the vehicle with the dead battery.

[SanNora]

I have driven the FAW J6 for many years, and the most common cause of a complete power loss is battery-related issues, such as battery aging or corroded/loose terminals. The battery lifespan for this truck is typically 3 to 5 years, and it's prone to power drain in low winter temperatures. If the dashboard goes completely dark, the main power fuse in the fuse box might have blown—it's located under the driver's seat, and you can see it by opening the cover. A faulty alternator can also lead to poor charging, often causing sudden power loss after long-distance driving. I recommend stopping immediately to inspect, using a wrench to tighten terminals or clean off rust; if that doesn't work, call for a tow truck. This situation is particularly dangerous during night travel, so it's best to have the battery voltage checked during routine maintenance as a preventive measure. Additionally, remember to turn off headlights and other electrical devices when not in use to avoid accidental discharge.

[VonChristian]

In the experience of managing FAW J6 fleets, a complete power loss is often caused by main wiring harness issues or battery failure. The battery is the power source, and its capacity decreases over time with use; damaged wiring, such as from rodent chewing or moisture-induced short circuits, can easily blow fuses. The fuse box is typically located on the side of the cab—check for any blown fuses above 30 amps. A loose or faulty alternator belt can drain the battery. A simple routine check involves using a multimeter to measure battery voltage: normal readings should be around 12.6 volts, and if it drops below 11 volts, replacement is needed. For prevention, inspect wiring connections monthly to ensure they are tight, avoiding breakdowns during long trips. In case of an incident, immediately turn on hazard lights, pull over, and call professional repair services.

[VonEvelyn]

My own FAW J6 suddenly lost all power, and the cause turned out to be corroded and loose battery terminals. I drive a lot and neglected maintenance. Simple solution: Open the hood and manually tighten the battery terminals; check if any fuses in the fuse box are blown. If the battery is old, replace it promptly—don't delay. If the engine doesn't respond when starting, pull over to a safe spot immediately. Remember to clean the terminals every six months to prevent rust—it saves a lot of trouble. If problems arise, call for roadside assistance promptly instead of taking risks like I did.