What happens when you disconnect the negative battery?
Disconnecting your car battery will not cause any permanent damage to your computer or ECU (electronic control unit), but it can have some adverse effects. Those include canceling your preset radio stations, forgetting learned shift points, and your car’s ideal fuel/air mixture.
Why does DC wire burn at negative terminal?
Since real life current flows from negative terminal to positive terminal of the DC source (unlike conventional current which flows from positive to negative terminal), it seems more logical for the wire at negative terminal to burn in case of a short circuit since it is at higher potential.
How is the negative terminal of a car connected?
Example: The negative terminal of the battery in cars (with combustion engine) is usually connected to the chassis by a short, braided ribbon while the positive terminal is connected to the relay on the starter by a round wire strand with thick insulation. Can you help by adding an answer?
When to disconnect the battery from the ground?
This sequence is actually wise to use on ANY vehicle with a battery. Always have the ground wire disconnected when you are connecting or disconnecting the red positive terminal.
Why is the negative terminal higher than the positive terminal?
The polarity of the terminals, the sign of the charge carriers in the wire, and the electric potential have no influence on this effect. PS. You wrote that the negative terminal is at a higher potential than the positive terminal because electric current in metals is based on negative charge carriers.
Is it OK to disconnect the NEG terminal?
Disconnecting the neg terminal will be just as effective a method of isolating the battery. Nope as there’s no circuit. But never, ever disconnect the positive. Disconnect the negative (unless you have a positive earth classic but in that case you already know).
Can You disconnect the negative terminal on a car battery?
Disconnect the negative terminal. That way, you don’t risk a catastrophic short-circuit if you accidentally touch your spanner against the bodywork or a metal component whilst you’re removing the positive terminal. Disconnecting the neg terminal will be just as effective a method of isolating the battery.
Why is there no current on the negative terminal?
If you remove the negative clamp and inadvertently complete a circuit to ground, there will be no current flow because the ground clamp is already grounded. Subsequent shorting of the positive terminal to ground will then produce no current flow because the current has no return path to the negative post.
Which is terminal to disconnect first, grounded or ungrounded?
Which terminal to disconnect first (the grounded one or the ungrounded one) is primarily a safety concern of the service technician. 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.