Product Overview
The FJC 45268 Replacement Booster Cable Clamp Set is designed for commercial duty applications, providing a robust and reliable connection for jump-starting vehicles. These clamps are rated for 800 Amps, ensuring efficient power transfer for various automotive needs.

Image: A pair of FJC 45268 replacement booster cable clamps. One clamp is red, indicating the positive terminal, and the other is black, indicating the negative terminal. Both clamps feature sturdy construction with insulated handles, designed for secure and efficient connection to battery terminals.
Safety Information
Always prioritize safety when working with vehicle batteries and electrical systems. Failure to follow these instructions can result in serious injury or damage to property.
- Wear appropriate personal protective equipment, including safety glasses and gloves.
- Ensure both vehicles are turned off and in park/neutral with the parking brake engaged.
- Do not allow the positive (red) and negative (black) clamps to touch each other at any time.
- Avoid contact with battery acid. If contact occurs, flush with water immediately and seek medical attention.
- Do not smoke or allow open flames near the battery. Batteries produce flammable gases.
- Keep children and bystanders away from the work area.
Setup and Installation (for Replacement Clamps)
These clamps are designed as replacements for existing booster cables. Proper installation is crucial for safety and performance.
- Prepare the Cable: If replacing old clamps, carefully cut off the old clamps, ensuring enough cable length remains. Strip approximately 0.5 to 0.75 inches (1.2 to 1.9 cm) of insulation from the end of your booster cable, exposing the copper wire strands.
- Insert Cable: Open the FJC replacement clamp. Locate the connection point inside the clamp, typically a crimp sleeve or a screw terminal. Insert the stripped end of the booster cable into this connection point.
- Secure Connection:
- For Crimp-Style Clamps: Use a heavy-duty crimping tool to securely crimp the clamp's terminal onto the exposed wire. Ensure a tight, permanent connection.
- For Screw-Style Clamps: Wrap the exposed wire around the screw terminal and tighten the screw firmly. Ensure no stray strands are loose.
- Insulate Connection: Slide the rubber or plastic insulating boot (if provided with your cable or the clamp) over the connection point to prevent accidental short circuits. Ensure the insulation covers all exposed metal parts except the clamp jaws.
- Test Connection: Gently pull on the cable to ensure the connection is secure. A loose connection can cause arcing and heat buildup.
Operating Instructions (Jump-Starting)
Once the clamps are securely attached to your booster cables, follow these steps for safe and effective jump-starting:
- Position Vehicles: Park the assisting vehicle close enough to the disabled vehicle so the booster cables can reach both batteries, but ensure the vehicles are not touching. Turn off both vehicles.
- Connect Red Clamp (Positive): Attach one red (positive) clamp to the positive (+) terminal of the dead battery. Ensure a firm, clean connection.
- Connect Other Red Clamp (Positive): Attach the other red (positive) clamp to the positive (+) terminal of the assisting vehicle's battery.
- Connect Black Clamp (Negative): Attach one black (negative) clamp to the negative (-) terminal of the assisting vehicle's battery.
- Connect Other Black Clamp (Ground): Attach the other black (negative) clamp to a clean, unpainted metal part of the disabled vehicle's engine block or chassis, away from the battery and moving parts. This provides a ground connection and helps prevent sparks near the battery.
- Start Assisting Vehicle: Start the engine of the assisting vehicle and let it run for 5-10 minutes to charge the dead battery.
- Attempt to Start Disabled Vehicle: After the charging period, attempt to start the disabled vehicle. If it doesn't start immediately, wait a few minutes and try again. Do not crank for more than 5 seconds at a time.
- Disconnect Cables (Reverse Order): Once the disabled vehicle starts, disconnect the cables in the reverse order of connection:
- Disconnect the black clamp from the disabled vehicle's engine block/chassis.
- Disconnect the black clamp from the assisting vehicle's negative (-) terminal.
- Disconnect the red clamp from the assisting vehicle's positive (+) terminal.
- Disconnect the red clamp from the disabled vehicle's positive (+) terminal.
- Allow Disabled Vehicle to Run: Let the newly started vehicle run for at least 20-30 minutes to allow its alternator to recharge the battery.
Maintenance
Proper maintenance extends the life of your FJC booster cable clamps.
- Clean After Use: After each use, wipe the clamps clean with a dry cloth to remove any dirt, grease, or battery acid residue.
- Inspect Regularly: Periodically inspect the clamps for signs of damage, corrosion, or loose connections. Check the integrity of the insulation on the handles.
- Store Properly: Store the clamps in a dry, cool place, ideally in a storage bag or box to prevent tangling and damage. Ensure the clamps do not touch each other during storage.
- Avoid Overstretching: Do not overstretch the spring mechanism of the clamps, as this can weaken their grip.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Vehicle does not start after jump attempt. | Loose or corroded connections; severely dead battery; issue with vehicle's starter/alternator. | Ensure all clamp connections are clean and tight. Allow more charging time. If still no start, consult a mechanic. |
| Clamps get hot during use. | Poor connection; undersized cables (if not using recommended gauge); excessive current draw. | Check connections for tightness and cleanliness. Ensure your cables are of appropriate gauge for the application. Discontinue use if clamps become excessively hot. |
| Sparks when connecting/disconnecting. | Normal when making the final ground connection; improper connection order. | Ensure the final black clamp connection is to the engine block/chassis, not the battery. Always follow the prescribed connection/disconnection order. |
Specifications
- Brand: FJC
- Model Name: 45268
- Rating: 800 Amp (Commercial Duty)
- Connector Type: Clamp
- Recommended Use: Starting a car with a dead battery
- Item Weight: Approximately 1 Pound (0.45 kg)
- Product Dimensions: Approximately 8.67 x 1.5 x 8.21 inches (22.02 x 3.81 x 20.85 cm)
- Outer Material: Insulation
- Country of Origin: China
Warranty and Support
For warranty information or technical support regarding your FJC 45268 Replacement Booster Cable Clamp Set, please contact FJC customer service directly. Refer to the product packaging or the official FJC website for the most current contact details and warranty terms.
Note: This manual provides general guidelines. Always refer to your vehicle's owner's manual for specific jump-starting procedures and safety precautions.




