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Try this and learn how to use the tool and go back to my comment on what to measure.

https://www.youtube.com/watch?v=k2LgvmWNVwc

2 pins are the signals, the other is ground and dimmer light.
Electrical hacking 101
1) turn on car
2) measure voltage of each wire to ground, record the color and voltage
3) turn on the lights...

Computers are funny and telling them an on or off depends on the signal. So if you take the green wire and put it to ground instead of the brown wire that is a an active low signal. Do you have a...

Is a ground activated switch? Meaning you ground out the wires (called active low) to signal the computer to turn on cruise control.