Which Terminal Is Connected First On A Car Battery. Take caution at all times to never touch a metal object to both terminals of the battery at once. To be perfect remove the grounded terminal first usually it is the negative one unless you are working on a rare forklift or something.
When connecting the car battery the positive terminal is connected first and the negative terminal is connected to the last. Your battery cables are attached to the terminals by a nut so youll need to use a socket or adjustable wrench to loosen each nut. You really do not want this.
It is always advisable to disconnect the negative terminal first while disconnecting the battery.
If however the battery is fully charged the trouble is probably in the circuit. The grounded terminal should be disconnected first to ensure that a battery dead-short does not occur should the spanner disconnecting the other one contact a nearby grounded metal part. Ground one off first and on last for safety against shorting. The battery of your car powers the whole car with electricity.
