Civic L4-1668cc 1.7L SOHC MFI (2003)
3. Check for continuity between the terminals in each switch position according to the tables.
Driver's Switch:
The driver's switch is combined with the control unit so you cannot isolate the switch to test it. Instead, run the master switch input test procedures.
If the tests are normal, the driver's switch must be faulty. Replace the switch.
4. If the continuity is not as specified, remove the driver's door panel.
5. Remove the armrest from the door panel.