You have one of two things wrong. Either you are not getting power to your devices, or the return wire is not carrying the return back to the battery to complete the circuit.
So, to check this out, take a wire (one side of a jumper cable with a wire lead) and connect to the negative side of your battery, and then to the white negative return side of one of the devices.
Did that make it work?
Yes... you have somehow disconnected the return wire from all of your things.
No... then put the connection to the positive side of your battery, and to the positive side of a device.
Did that make it work?
Yes... you have not got power there, but bringing it directly from the battery makes it work. Find where the power feed has failed.
No... Use both sides of the jumper cable and short leads, and check each device and make sure the devices work.
Most likely, because many things are not working, you have lost the return connection because they are all hooked together somewhere before they go back to the battery.
