Blower Speed 3

Blower Speed 3

If blower speed 3 is selected, current flows across the blower motor switch (C0058) to the resistor pack (C0425) on an RG wire. The resistor pack (C0425) is connected to the blower motor (C0056) by a GK then G wire. As current has to flow through the smallest value resistor, the blower motor operates at an increased speed.

Blower Speed 4

If blower speed 4 is selected, current flows across the blower motor switch (C0058) to the blower motor relay coil (C0153) on an RS wire. The relay coil (C0153) is earthed on a BS then B wire. The energised blower relay allows a feed from fuse 8 of the engine compartment fuse box (C0576) across the closed relay switch (C0153) directly to the blower motor (C0056) on a GR then G wire. As current by-passes the resistor pack, the blower motor operates at high speed.

Fresh/Recirculated Air

Fuse 4 of the passenger compartment fuse box (C0586) provides an ignition feed to the fresh/recirculated air motor (C0006) and the fresh/recirculated air switch (C0750) on G then LGS wires. When the switch is the normal (released) position, it provides an earth path for the motor (C0006) via a Y wire. The motor will open the recirculation flap, allowing the heater to use air drawn from outside the vehicle.

If the fresh/recirculated air switch is pressed, it provides an earth path for the motor (C0006) via a K wire. The motor will now close the recirculation flap, allowing the heater system to use recirculated air. The switch is mounted on the centre console and is earthed (C0750) on a B wire.