61 valiant turn signals ??

Here is the deal I am retired on a fixed income and this car is my toy. After checking out the prices on this switch I am wondering when I will get the money to buy one. So is there anything I can do to make at least the brake lights work until I can afford one ? Also I have a wiring diagram and looking at it there should be 2 wires going to each bulb but the drivers side has 3 green brown and black ? any suggestions would help.
Thanks
Green is turn/brake brown/tail and black/ground.