Q: Where is the switch located on the transmission on Toyota Echo and Toyota Yaris?
A: The switch is located on the top of the transmission, behind the shift/selector lever assembly. With the transmission fitted, the switch is partly obscured by the battery tray. The back up light switch is below the battery tray when the transmission is in place. Trace the wiring from the switch, and disconnect it at the in-line connector, which is on the front of the unit. Disconnect the back up light switch wiring plug on the front of the transmission. Unscrew and remove the switch from the top of the transmission, and remove it. Refitting is a reversal of removal. Tighten the switch securely.