If you are talking about disconnecting a battery in a vehicle, yes.
You have to disconnect the ground wire from the block. You have to disconnect the positive wire from the starter and the alternator and the powerline going to the fuse box. and connect the new ground then the positive
Answer for USA, Canada and countries running a 60 Hertz supply service.Underground or using triplex, a new ground has to be established at the new distribution's sub panel. It must be in the form of a ground plate or ground rods with the ground wire being connected to the neutral point in the sub panel.
No. Hook up the power wire first, then the ground wire. The ground wire is what acutually draws the power to the unit. As you will notice the power wont turn on if just the power wire is plugged in..
You don't want to remove the ground wire because it protects the two wires inside from RF frequencies, but in case you have a ground loop problem, you might want to disconnect the ground using a ground lift.
To hook up a tachometer on a 1996 Subaru Impreza, first identify the correct wire for the tach signal, which is typically the yellow wire from the ignition coil. Disconnect the negative battery terminal for safety, then connect the tachometer's signal wire to the yellow wire. Connect the ground wire of the tachometer to a suitable ground point, and the power wire to an accessory power source. Finally, reconnect the battery and test the tachometer for proper operation.
Black wire to gold screw terminal, white wire to silver screw terminal, ground wire to ground terminal. I am sorry, I can't even begin to answer this question. I don't what you are trying to do and I am positive you don't either. Call a pro, please...pkazsr
To read a ground fault using a meter, you can use a digital multimeter set to measure resistance. Disconnect the ground wire and touch one probe to the ground wire and the other probe to the ground terminal. A reading of 0 ohms indicates a direct short to ground and signifies a ground fault.
Establish which terminal is connected to ground and disconnect the wire from the terminal. Disconnect the terminal on the other battery that is connected to the load. Finally disconnect the loop between the batteries.
on cooling fans disconnect wire at fans,runwire from fan side to positive on battery!!run another wire to ground. if they are ok they will run!!if not it can be bad fans or a bad fan sensor!!check for bad fuse!!first
Disconnect the plug to your fan. Hook a jumper wire to ground the negative wire and a hot wire to the positive wire. If the fan doesn't work, then you can buy one on Ebay or other sources.
To wire a wall switch correctly, first turn off the power to the circuit. Remove the old switch and disconnect the wires. Connect the new switch by attaching the hot wire to the brass screw, the neutral wire to the silver screw, and the ground wire to the green screw. Secure the switch in place and turn the power back on to test it.
disconnect the negative (black) first then positive (red).