Location of the AC fan relay switch on a 2003 Land Rover Discovery

Do you already have access to your blower motor? If so you should find the resistor on the motor housing where the blower output is located. It will have wiring plugged into it. When you remove it it should look like a heatsink.

To replace disconnect battery neg cable then:
1. Remove glovebox door
2. Remove fusbox by disconnect all multiplugs, then remove all torx screws securing fusebox then set aside
3. remove footwell air distribution tube off of heater box
4. disconnect multiplug off of blower resistor, remove resistor/replace,
5. Refit all components

There is a resistor pack that controls the fan speed switches. Not sure about the 2000 Disco but on Range rovers of that era it is under the cover below the decker panel.- namely at the rear of the bonnet. Check that it actually is there, then get back to me and I'll post details of how to replace it

The serpentine belt routing diagram for a 1998 Land Rover Discovery 4.0 liters with A/C


CS = Crankshaft
F = Fan pulley
G = Guide pulley
Gen = Alternator
HP = Hydraulic Pump
T = Tensioner
AC = Air Conditioning
PAS = Power Assisted Steering

Disconnect the plugin wires to rad. fan and test for voltage to plug. Using an ohmmeter, see if the fan connection is open. If open,replace motor.If no voltage, check fuse,relay, and wiring and possibly the switch for loss of power.While moving,the air passes through condensor to make it work but in traffic and at stop,not enough air to remove heat from condensor.

In the engine fuse box under the bonnet ,relay is the closest one to the front of the vehicle ,about £7 to replkace

There is a safety switch that can be reset under the hood on the passenger side under the fuse box panel.

Cig fuse is F10 (15amp fuse) and the fuse box is located behind the driver's side cubby box.
Passenger Compartment Fuse Box - behind the driver side cubby box
Panel & Relays

There are two fuse boxes. One in the engine compartment and one under the dash on passenger side.

You can find all parts for your Discovery here.

This may be your wiper switch on your steering column very common problem.