Fixing a Charger for a Cordless Vacuum Cleaner

The charger for a cordless vacuum cleaner is broken. There is no DC output on the connector from the charger:

Use two pin adapters (below, left, red and black) for the multimeter probes (below, right):

Measured DC output from the wires of the charger (power supply ) side,  is OK:

Measured the DC output on wires from the terminal side on the vacuum cleaner, is also OK:

Measured DC voltate with the positive output (black probe) in the terminal and negative wire (red probe) from the pin connector,  is also OK:

But if both probes are in the terminal side, it will not work (the picture is the first one) :

So, there is no connection between the negative terminal (*) and the pin adapter of negative wire (**)Use this function with beeping sound:

Cut the top plastic terminal with a knife:

The copper wire (negative) is exposed (green circle, sorry, not focused):

Then cut a piece of copper stripe (lower part) from a copper sheet (top part):

Take the brass tube out from the negative terminal:

Put one side of the copper stripe into the negative terminal and also put the brass tube back into the negative terminal:

Use a hammer to put the brass tube in:

Now the brass tube is in and then bend the other end of the stripe to the exposed negative wire (notice the exposed copper wire in green arrow):

Wrap the terminal with electric tape:

Finished terminals:

It is done:

Plug it in the vacuum cleaner:

It works: