Land Rover Defender Electrical Library 3rd Edition Nas Rover Manual

CIRCUIT OPERATION
DEFENDER 90 NAS35CLOCK  
DESCRIPTION  
The analogue clock is located towards the center of the dash panel.  The clock is
illuminated when the sidelights are switched on.  
OPERATION  
Feed from the positive battery terminal is connected to the engine compartment fuse box
(C632-1) by the brown wire.  Current passes through fusible link 1 and fusible link 2 of
the engine compartment fuse box which are connected in series. Fusible link 2 of the
engine compartment fuse box (C574-3) provides...

CIRCUIT OPERATION
36DEFENDER 90 NASCIGAR LIGHTER  
DESCRIPTION  
The cigar lighter is located towards the center of the dash panel. Pressing the center of the
cigar lighter latches the heater element in to the holder. With the ignition switched on,
power flows through the heating element of the cigar lighter, causing it to heat up. When
the heating element reaches a sufficient temperature, the holder automatically releases the
cigar lighter which can then be removed for use.  
The location of the cigar...

CIRCUIT OPERATION
DEFENDER 90 NAS37IN-CAR ENTERTAINMENT   
DESCRIPTION  
The radio/cassette player operates when the ignition switch is in position I or II.  Signal
output from the radio/cassette player is relayed to four loud speakers via a power
amplifier. The radio/cassette player controls are illuminated when the unit is switched on.
The illumination dims when the sidelights are switched on.  
OPERATION  
Feed from the positive battery terminal is connected to the engine compartment fuse box
(C632-1)...

CIRCUIT OPERATION
38DEFENDER 90 NASIllumination  
Fusible link 4 of the engine compartment fuse box (C573-2) is connected to the lighting
switch (C41-1) on the brown wire.  With the lighting switch in the on position, power
flows across the switch to fuse 11 of the passenger compartment fuse box (C581-1) on
the brown wire.  Fuse 11 (C581-2) supplies the radio/cassette unit illumination (C98-6)
on the red/black wire.  

CIRCUIT OPERATION
DEFENDER 90 NAS39IGNITION AND SHIFT INTERLOCK  
DESCRIPTION  
Ignition interlock  
The ignition interlock prevents the following actions unless the gear selector lever is in
the Park position and the transfer box is in either High or Low range: 
· Key cannot be turned from position I to position 0. 
· Key can be turned to crank position III but starter motor will not operate.  
Shift interlock  
The shift interlock prevents the gear selector lever being moved from the Park position...

CIRCUIT OPERATION
40DEFENDER 90 NASSimilarly, if the automatic transmission selector lever is not in park, the PARK 1 switch
will be closed and a ground path is provided for key interlock solenoid on the
brown/yellow wire, through the closed switch contacts, on the black wire (C668-4) &
(C550-6). Again, the key interlock solenoid will be energized an the key cannot be
removed.
Either, or both, of the above conditions will cause the key interlock solenoid to be
energized. Only with the transfer gearbox...

CIRCUIT OPERATION
DEFENDER 90 NAS41With the automatic transmission inhibitor switch in either Park or Neutral, a ground path
is provided for the interlock relay winding (956-86), on the black/yellow wire, through the
diode (C801-1 & 2), through the closed switch contacts (C069- 5 & 4), to the
immobilization ECU on a black/orange wire (C057-10) and from the immobilization ECU
(C057-11) to ground on a black wire. With the relay energized, current flows from fuse
18 of the passenger compartment fuse box...

CONNECTOR DETAILS
DEFENDER 90 NASC1C1
DIRECTION
INDICATOR - LH
2 Way
Female
RED
Behind LH front indicator
lampCavColorCct1BALL2GRALL 

   CONNECTOR DETAILS
DEFENDER 90 NASC2C2
DIRECTION
INDICATOR - RH
2 Way
Female
RED
Behind RH front indicator
lampCavColorCct1BALL2GWALL 

CONNECTOR DETAILS
DEFENDER 90 NASC3C3
HORN
1 Way
Female
NATURAL
Under bonnet, LH inner
fenderCavColorCct1PBALL