Which Terminal On A Battery Is Connected First. There will be no spark because the ground is open. Positive first then negative.
When disconnecting the cables from the old battery disconnect the negative first then the positive. Simple the car is always connected to the negative terminal of the attached battery meaning if you connect a charged batterys negative to amother car first the whole car chassis will be connected to that charged batterys negative. In a car the negative terminal of the battery is connected to chassis.
The battery now in the light has no clear indications as to which terminal is which.
Connect the new battery in the reverse order positive then negative. Then I connect the negative ground to the engine block bumper or some part of the frame far away from the battery. The negative terminals cable connects to your vehicles frame which is part of the circuit but its current flows from your cars frame and components. The battery of your car powers the whole car with electricity.
