1975 Datsun 280z FSM - Spooled up Racing

Body Electrical System
ELECTRIC REAR
WINDOW DEFOGGER
DESCRIPTION
The electric rear window defogger
system consists of defogger switch,
defogger relay, defogger warning lamp
and filament in the rear window glass.
The filament is attached inside rear
window. Heat from filament keeps
rear window free of fog and frost.
Defogger relay is located on relay
bracket.
Defogger switch and relay is installed
on console box.
Defogger warning lamp
1 Lamp body
2 Bulb
3 Socket
BE672A
Fig. BE-123 Defogger switch and warning lamp
REMOVAL AND
INSTALLATION
Defogger switch,
warning lamp
Defogger switch is held against
console box by spring pressure.
1. Disconnect battery ground cable.
2. Remove console box referring to
Section BF.
3. From behind console box, grasp
nail of switch body and push it out of
console box.
4. Disconnect lead wires at a connector.
5. Installation is in the reverse sequence
of removal.
Note: In installing, switch body can
be installed on console box only by
pressing it in.
1 Engine room harness
2 Dash harness
3 Instrument harness
4 Fuse block
5 Catalyzer hold relay
Air-con relay
Defogger relay
Horn relay
Intermitter wiper
relay
BE592A
Fig. BE-124 Defogger relay
Defogger relay
Defogger relay is located on relay
bracket.
1. Remove battery ground cable.
2. Disconnect lead wires for defogger
relay at a connector.
3. Remove two screws retaining
relay to relay bracket.
Relay can then be taken out easily.
4. Installation is in the reverse sequence
of removal.
WARNING LAMP BULB
REPLACEMENT
1. Remove console box referring to
Section BF.
2. Push socket with bulb behind
warning lamp body and twist it counterclockwise.
Socket with buib can then be taken
out.
3. Remove bulb from socket.
4. Install new bulb. Assembly is in
the reverse sequence of removal.
BE-72
Bulb wattage:
Rear window defogger warning
lamp 1.4W
INSPECTION
Defogger switch
Test continuity of switch by using
test lamp or ohmmeter. Test must be
carried out with switch at both ON
and OFF. Refer to Figure BE-123
continuity diagram of defogger switch.