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LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Oxygen Sensor Relay: Service and Repair

Oxygen Sensor Heater Relay Location V8:

The Heated Oxygen Sensor Control Module is located on the auxiliary relay panel located under the carpet in the passengers footwell.

1. To remove pull straight up and use slight "wiggle" motion to avoid plug terminal distortion.
2. Position new control module over plug terminals and rotate until terminal positions match.
3. Push straight down until module is completely seated.