Ventilation Fan

�0Ventilation Fan:

WIRING DIAGRAM

Ventilation Fan: Component Location:

COMPONENT LOCATION VIEW

Ventilation Fan: Component ID:

COMPONENT ID
22A Main fuse board in the dashboard.
35 Ventilation fan switch on heating and ventilation control panel.
36 Motor, ventilation fan, in the centre behind the bulkhead partitions.
74 Resistor, ventilation fan, under the cabin air filter on the left-hand side.

Grounding Points
G33P Grounding point, connector bracket (Power) below the left-hand A pillar.

DESCRIPTION OF OPERATION
Current is supplied to ventilation fan switch 35 via fuse 3.

The ventilation fan switch controls the fan motor via resistor 74 and with the aid of the resistor it is possible to obtain four different fan speeds.
^ Position 1: Entire resistor in circuit (2.6 ohms + 0/-20%).
^ Position 2: Two-thirds of the resistor in circuit (1.19 ohms + 0/-20%).
^ Position 3: One-third of the resistor in circuit (0.31ohms + 0/-20%).
^ Position 4: No part of the resistor in circuit

FAULT DIAGNOSIS HINTS
The ventilation fan will be operative when the ignition switch is in the Drive position.
1. Check that fuse 3 is intact and supplied with current.
2. Check that current is supplied to switch 35.
3. Set the switch to different positions and check that the voltage supplied to the fan motor changes.
4. Check the connectors, wiring and ground connections.