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Fuses and relays
To avoid short circuit or overloading damage
to the electrical cables or apparatus, the
individual circuits are protected by fuses.
The main fuse box is mounted in the passen-
ger footwell under the floor panel. To change
a fuse or relay, the carpet must be folded
back, and the floor panel hinged upwards. If
a considerable amount of work is necessary
on the fuse box, the battery earth cable
should be disconnected.
Changing a fuse
Switch off the affected system.
A blown fuse is evident from the burnt
through wire. To replace the fuse, it must be
pulled out of the clips. The fuse should only
be replaced with a fuse of the same rating.
Fit the new fuse with the wire visible. When
fitting, avoid touching the wire or bending
the clips that hold the fuse. The fuse must sit
firmly in the clips.
Warning: Never repair a fuse with wire or
silver foil as serious damage could result.
Should a fuse blow several times, an author-
ised workshop should be consulted.
At the top edge of the fuse box is space for
spare fuses. It is advisable to carry spare
fuses of the different ratings in the vehicle.
Fitted underneath the fuses are relays for
various electrical switching functions.
Changing of defect relays should be left to
an authorised workshop.
Relay function
l + ll Double relay for rear screen heating
III Not used
IV Not used
V Flasher unit
VI Window regulator
VII Headlight washer pump
VIII Not used
IX Not used
X Horns
XI Not used
XII Fog lamps
XIII Wiper delay
XIV Starter relay
XV Concentrated wash system
XVI Not used (on US vehicles relay for
L-Jetronic)
XVII Fuel pumps
XVIII Blower fan for additional air con.
cooler
XIX+XX Double relay for retractable
headlights
XXI Fresh air blower
XXII Defrost pos. (blower pos. 4)
The time relay for the seat belt warning is in
the middle console in front of the radio.
The relay for the rear screen wiper is at the
rear left behind the tool tray. The relay for
the automatic seat movement (forwards) is
under the seat.
74
Summary of Contents for 928S 1983
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