Discovery II (LT) V8-4.0L (2002)
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Brake Lamp: Description and Operation
Brake/Reverse Lamps Description
Brake Lamp Description
The brake lamps are operated by a switch mounted on the pedal box. The switch, when operated, supplies power to two brake lights located in the tail
lamp units and a high mounted brake light. All brake light bulbs are rated at 21 Watts. A feed is provided to the trailer pick-up (if fitted) when the brake
switch is operated. When the brake light switch is in the open position feeds are routed through the switch contacts to give:
Automatic V8 vehicles
A feed to the cruise control ECU for cruise control operation.
Manual V8 vehicles
A feed to the clutch pedal switch for cruise control operation.
Reverse Lamp Description
The reverse lamps are operated by a switch located in the vehicle gearbox. The switch, when operated, supplies power to two reverse lamps located in
the tail lamp units. The reverse lamp bulbs are rated at 21 Watts. When the reverse lamp switch is operated an input is also provided to:
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The Body Control Unit (BCU) for rear wiper operation
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The interior mirror for selection of normal mirror position.
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The trailer pick-up (if fitted).
Automatic vehicles have a dual function starter inhibitor and reverse light switch. The inhibitor function prevents the engine from cranking if reverse
gear is selected
Brake/Reverse Lamp Supply
Circuit supply
A feed from the battery positive terminal is connected by an R wire to the engine compartment fusebox where it passes through fusible link 8.
Ignition switch supply
In the engine compartment fusebox a feed from fusible link 8 is connected to the passenger compartment fusebox by an NW wire. The feed passes
through the fusebox and is connected to the ignition switch by an N wire.
When the ignition is switched on to position II, a feed from the ignition switch is connected to the passenger compartment fusebox by a Y wire and
passes through fuse 25.
