How to Jump Start an International Box Truck

Recommended Equipment to Jump-Start a Heavy Truck

To jump-start a heavy-duty truck you need the right equipment. Here’s what you should have:

Heavy-Duty Jumper Cables

Heavy-duty cables can handle the higher current needed for big trucks. Regular car battery cables won’t work as they are not designed to carry the necessary amperage. Look for cables with thick wires and strong clamps. Ideally a 4-gauge or thicker. The cable’s length is also important. Longer battery cables give you more flexibility. 

Portable Jump Starter

A portable jump starter or a jump pack is a lifesaver if there’s no other vehicle around. It’s essentially a battery pack with enough power to jump-start a truck. Choose one with enough power for big diesel engines. 

These engines typically need a high cold cranking amps (CCA) rating. Look for a model that offers at least 1500 CCA. Some heavy-duty jump boxes are portable and have extra features. 

Safety Gear

Always wear gloves and safety glasses when working with batteries. Batteries can leak acid, which is corrosive and can cause serious burns or eye injuries. Sparks can also occur during the jump-start process which can be dangerous. 

Battery Charger

If the battery is too weak, a charger can help. It slowly charges the battery before you jump start. This can prevent damage to the battery and the truck’s electrical system. Battery chargers come in various types. 

These include trickle chargers which provide a slow, steady charge. They also include smart chargers. The chargers adjust the charge rate to prevent overcharging. 

Multimeter

A multimeter checks the battery voltage. It helps you diagnose if the battery is the problem or if it’s something else. You can determine if the battery has enough charge to start the engine by measuring the voltage. 

A fully charged battery should read around 12.6 volts. If the reading is significantly lower, the battery may be too discharged to start the truck. A multimeter can also check the alternator and other parts. It’s a useful tool for diagnosing electrical problems. 

Determine if Your Truck Batteries Are Wired in Series or Parallel

Knowing if your truck batteries are wired in series or parallel is crucial. It helps prevent damage or injury during the jump-start process. 

How to Jump Start a Diesel Truck With Parallel Wired Batteries

• Step 1: Prepare Your Equipment
  Ensure you have heavy-duty jumper cables and a working vehicle. You need heavy-duty cables to handle the high current for large diesel engines. Ensure the working vehicle’s battery matches the power of the dead battery. 
  
  

• Step 2: Connect Positive Terminals
  Attach the red cable to the dead battery’s positive terminal. The positive terminal is usually marked with a (+) sign. Then, connect the other end of the red cable to the positive terminal of the working battery. Ensure the connections are secure to prevent sparks. 
  
  

• Step 3: Connect Negative Terminals
  Attach the black cable to the working battery’s negative terminal. Next, connect the other end of the black cable to a grounded metal surface on the dead truck. This should be an unpainted metal part away from the battery. This step helps prevent sparking near the battery.
  
  

• Step 4: Start the Dead Truck
  Attempt to start the truck with the dead battery. If it doesn’t start immediately, wait a few more minutes with the working vehicle running. Sometimes it takes a bit longer to transfer enough charge.
  
  

• Step 5: Remove Cables in Reverse Order
  Fast remove the black cable from the grounded surface on the dead truck. Then, remove it from the working battery’s negative terminal. Next, remove the red cable from both positive terminals. Be cautious during this process to avoid any contact between the cable clamps. 

How to Jump Start a Semi-Truck Wired in Series

• Step 1: Gather Your Equipment:
  Use heavy-duty jumper cables and a functioning vehicle. As with parallel wired batteries, ensure the cables are rated for heavy-duty use and that the working vehicle has a compatible battery.
  
  

• Step 2: Align the Vehicles
  Park the vehicles so the jumper cables can easily reach both batteries. Ensure both vehicles are turned off and set the parking brakes. Confirm the vehicles are in park or neutral to avoid any unintended movement.
  
  

• Step 3: Connect Positive Terminals
  Attach the red cable to the positive terminal of the first battery in the series on the dead truck. Then, connect the other end of the red cable to the positive terminal of the working vehicle’s battery. Ensure the connections are tight and secure.
  
  

• Step 4: Connect Negative Terminals
  Attach the black cable to the negative terminal of the working vehicle’s battery. Then, connect the other end of the black cable to the second battery’s negative terminal on the dead truck. This ensures the correct flow of electricity through the system.
  
  

• Step 5: Start the Working Vehicle
  Turn on the working vehicle and let it idle for a few minutes. This allows the power to build up in the dead batteries, preparing them for the jump start.
  
  

• Step 6: Start the Truck
  Try starting the truck with the dead batteries. If it doesn’t start right away, wait a few more minutes while the working vehicle continues to run. Be patient, as larger batteries may take longer to charge.

• Step 7: Disconnect Cables Carefully
  Remove the black cable from the negative terminal of the second battery on the dead truck first. Then remove it from the negative terminal of the working vehicle. Finally, remove the red cable from both positive terminals. Ensure the clamps or any metal surfaces do not touch each other during removal. 

The Do’s and Don’ts of Jump-Starting Box Trucks

Jumpstarting Do’s

• Do Wear Safety Gear: Always wear gloves and safety glasses to protect yourself. Batteries can leak acid and sparks can fly during the process. 

• Do Check Battery Voltage: Use a multimeter to check the battery voltage before starting. Knowing the voltage can help determine if the battery is completely dead or needs a boost.

• Do Use Heavy-Duty Cables: Ensure your jumper cables are rated for heavy trucks. These cables are thicker and can handle the higher current that large engines need. 

• Do Follow the Manufacturer’s Instructions: Refer to your truck’s manual for specific jump-starting guidelines. Different trucks may have unique procedures and following the manual ensures you don’t damage your vehicle.

• Do Let Donor Vehicle Run: Allow the donor vehicle to run for a few minutes before starting the dead truck. This helps charge the dead battery slowly. It reduces strain on both vehicles’ electrical systems.

Jumpstarting Don’ts

• Don’t Use Regular Car Cables: They can’t handle the current needed for box trucks. Using inadequate cables can lead to overheating and even fire hazards. 

• Don’t Connect Directly to the Negative Terminal: Attach the black cable to a grounded metal part, not the negative terminal. This prevents sparking near the good battery, which could ignite any flammable gases present.

• Don’t Jump-Start if Battery is Damaged: If the battery is leaking or swollen, replace it. Jump-starting a damaged battery can be dangerous and may cause it to explode. 

• Don’t Touch Clamps Together: This can cause sparks and potential explosions. Always handle the clamps carefully. Keep them separated until they are properly attached to the terminals. 

• Don’t Leave the Engine Running Unattended: Stay with the vehicle for the whole jump start. If something goes wrong, you need to be there to shut off the engine quickly to prevent accidents. 

Trust HOLT Truck Centers for Your Truck Maintenance Needs

Jump-starting a box truck is essential. But, having a reliable partner for all your truck maintenance needs is even more crucial. HOLT Truck Centers offers expert maintenance services to keep your fleet running smoothly. 

We’ve covered the steps to identify your battery wiring setup. You’ve also learned about the needed gear and the do’s and don’ts of jump-starting your truck. But for comprehensive care, trust the professionals.

Explore Our Maintenance Services

Are you ready to ensure your trucks are always in top shape? Visit HOLT Truck Centers for expert maintenance services.

We do battery care, as well as complete truck services. 

Contact us today!