The Parts needed are very simple, and should be found at all local electronic parts shop.
4 X 1K resitors. 1/4w is fine
2 x 10k resistors. 1/4w is fine
3 x wires of different colors ,about 2 feet long gauge 20
1 x single pole double throw switch, something with 3 pins
2 x shrink wrap tubing for protecting the circuitry , or electrical tape
shrink wrap to hide all of the 3 wires and the circuitry
3 x crocodile connectors
complete tool ready for use
AND NOW PLAYING WITH IT
the tool sits on the front engine bank with the orange wire connected at the alternator pole, and the green wire connected to the chassis ground. white wire leads to the front bank ox sensor wire
This tool can be used to make sure the wiring and ECU are correctly working. leaving the only possible culprit to the sensor itself if something is wrong.