Land Rover Discovery: Electrical Precautions
GENERAL
The following guidelines are intended to make sure the safety of the
operator whilst preventing damage to the electrical and electronic
components of this vehicle.
EQUIPMENT
Prior to commencing any test procedure on the vehicle, make sure that the
relevant test equipment is working correctly and that any harness or
connectors are in good condition. It is particularly important to check the
condition of all plugs and leads of mains operated equipment.
POLARITY
Never reverse connect the vehicle battery and always make sure the correct
polarity when connecting test equipment.
HIGH VOLTAGE CIRCUITS
Whenever disconnecting live ht circuits, always use insulated pliers and
never allow the open end of the ht lead to contact other components,
particularly ECU's.
VEHICLES INSTALLED WITH BI-XENON HEADLAMP BULBS
WARNING:
The following precautions must be observed as failure to comply may
result in exposure to ultra-violet rays, severe electric shock, burns or
risk of an explosion.
- Safety goggles and gloves must be worn.
- Make sure that headlamps are switched off before removing bulbs.
- Do not touch the glass portion of the bulb.
- On no account should headlamps be switched on with the bulb removed
from the headlamp.
- Bulb testing may only be carried out with the bulb installed in the
headlamp.
- Bulbs must be disposed of in accordance with the local authority byelaws.
CONNECTORS AND HARNESSES
The engine compartment of a vehicle is a particularly hostile environment
for electrical components and connectors. Always observe the following:
- Make sure electrically related items are dry and oil free before
disconnecting/connecting test equipment.
- Make sure that disconnected multiplugs and sensors are protected from
any possible oil, coolant or other liquid contamination. Any such
contamination could impair performance or lead to component failure.
- Never force connectors apart or pull on the wiring harness.
- Always make sure locking tabs are disengaged before disconnecting
multiplugs etc. and make sure that correct orientation is achieved before
connection.
- Make sure that any protection covers, insulation etc. are replaced if
disturbed.
Having confirmed that a component is faulty, carry out the following:
- Switch off the ignition and disconnect the battery.
- Remove the component and support the disconnected harness.
- When replacing electrical components, keep oily hands away from
electrical connections and make sure that locking tabs on connectors are
fully engaged.
BATTERY DISCONNECTION/CONNECTION
Always refer to the Electrical Section of this manual - Battery
Connection/Disconnection prior to attempting to connect or disconnect the
battery.
For additional information, refer to: Specifications (414-01 Battery,
Mounting and Cables, Specifications).
READ NEXT:
The following information lists basic precautions which must be observed if
fuel is to be handled safely. It also outlines other areas of risk which must
not be ignored. As this information is issued
Never use a seal which has been improperly stored or handled.
Take great care when removing old seals that the sealing surfaces and
seal
housing are not damaged.
Carefully examine seal before in
WARNING:
Do not install rear facing child seats in the front passenger seat.
The SRS contains components which are potentially hazardous to service
personnel if not handled correctly. The following gu
SEE MORE:
CHECK
WARNING:
Observe due care when draining, as the fluid can be very hot.
All vehicles
WARNING:
Make sure to support the vehicle with axle stands.
NOTE:
Make sure that the vehicle is standing on a level surface.
Raise and support the vehicle.
Refer to: Engine Undershield (501-02 Front End Body Pa
PRINCIPLES OF OPERATION
For a detailed description of the Daytime Running Lamps, refer to the
relevant Description and Operation section in the workshop manual. REFER
to: Daytime Running Lamps (417-04 Daytime Running Lamps, Description
and Operation).
INSPECTION AND VERIFICATION
CAUTION:
Diagnosis b