Positive Clamp (Red) Negative Clamp (Black) A Guide To The Status Indicator: If The Light is Solid Green: The voltage of the vehicle battery is normal. You can jump- start the vehicle with the JUMPSURGE 3000. If The Light Doesn't Turn On: The voltage of the vehicle battery is too low to be detected. Press and hold the BOOST Button for around 3 seconds until it lights up. Then, the jump starter will enter a forced output mode. Start your vehicle within the next 30 seconds. Note: The forced output mode disables all safety protections temporarily. Therefore, only use this mode when the vehicle battery is extremely low.