Mazda RX-8 Workshop Manual page 2340

12. Press the interlock cable lock piece in unitl it is locked.
CAUTION:
Applying a load to the interlock cable while pressing the lock piece in can affect the lock unit operation.
13. Remove a 1.5 mm {0.06 in} round bar or similar from the lock unit hole A, B and C.
14. Connect the brake switch connector with the brake pedal released.
CAUTION:
The clearance between the brake switch and the brake pedal is automatically adjusted to the correct amount
when the brake switch connector is connected after the brake switch has been properly installed. If the brake
switch is not properly installed or the connector is connected before installation, the clearance may be incorrect,
causing a brake light malfunction. Therefore, always verify that the brake switch is properly installed before
connecting the connector.
Once the brake switch clearance has automatically been adjusted, it cannot be adjusted again. Therefore,
replace the switch with a new one when replacing the power brake unit or the pedal, or performing any
procedure that changes the pedal stroke.
15. Turn the ignition switch to ON position.
16. Install the interlock cable to the key cylinder.
17. Slide the outer casing to the key cylinder, and insert the clip over the convex part of the outer casing.