The DF-601A protects electronic components such as ABS, engine management systems, fuel injection systems, radios, alarms and other sensitive electronics. Achieve greater protection by increasing voltage surge preotection during mig and spot welding, jump starts, plasma cutting, and other repair applications. Features such as a heavy-duty varistor, not a small diode insuring maxium protection and peace-of-mind. A red LED indicates that the device is working and correctly connected. If the unit is overloaded or damaged, the light will go out.
Instructions:- Connect battery to terminals.
- Red to power.
- Black to ground.
- Red light will turn on.