2. Disconnect the plug from the fan switch.
3. With the following switch positions, check the current flow between the respective terminals.
switch position | off | 1 | 2 | 3 | 4 |
terminals | a - c | a - c | a - c | a - c | a - c |
b — f | b — d | b — d | b — d |
switch position | off | 1 | 2 | 3 | 4 |
terminals | a - c | a - c | a - c | a - c | a - c |
b — f | b — d | b — d | b — d |