Backup Lamp: Testing and Inspection

- Check for blown fuses in circuits A2 and F20.
- Check for continuity across the stop lamp switch when it is closed.
- For rear lighting on the left side of the vehicle, the Z1 circuit grounding point is in the left rear wheel well.
- For rear lighting on the right side of the vehicle, the Z1 circuit grounding point is in the right rear wheel well.
- For the stop lamp switch, the Z1 circuit grounding point is in the left front inner fender shield.
- Circuit L1 also provides an input for the Powertrain Control Module (PCM) on automatic transaxle equipped vehicles.
- Circuit F20 feeds the heated rear-window switch and A/C clutch cycling switch.