Electrical System - Volvo PV 544 Instruction Book

•Servicing

Electrical system

Q Check the battery electrolyte level
The electrolyte level should be checked whin the fuel tank ii being filled. The
electrolyte level should be 5 — 10 mm (
Top up with distilled water if necessary. Never add too much distilled water since
this can cause the acfd to splash over and result in corrosion on the part; of the
engine around the battery. Never check the electrolyte level by lighting a
match. The gases formed in the eel Is are very explosive.
^ Check the state of charge of the battery
The state of charge of the battery should be checked after every 5000 km (3000
miles). This check is carried out with the help of a hydrometer, this showing the
specific gravity of the electrolyte which varies with the state of charge, see page
56. During the winter the state of charge must be checked more often since a fully
charged battery is more resistant to frost damage than a half charged one.
^) Check headlight alignment
The alignment of the headlights should be checked in a Volvo workshop after every
10 000 km (6 000 miles). Remember that the lection of the road lit up by the
headlights can vary depending on the loading in the verhicle. When the headlights
are adjusted in a workshop, the beams are therefore directed rather low so thai
when the vehicle is loaded, the alignment does not exceed the maximum value
permitted in accordance with traffic regulations.
Replacement of bulbs
The replacement of bulbs in the various lighting units is shown on the following
pages. Some of the bulbs have two functions, for example the headlight bulbs
which have filaments for both Full and dipped lights. The guide pins on the
socket for these bulbs are either of different thickness or they are staggered so
that the bulbs can only be fitted in one determined position. Certain makes
, • of butbs have a "Top" mark on the socket and this should be turned upwards.
When fitting butbs do not touch the glass with
your fingers. The reason for this ti that
grease, oil or any other impurities can be
car bom led onto the bulb and this can
cause damage to the reflector.
Replacing the roof light bulb
When replacing the roof light bulb the lamp shade Is pulled
straight out. 42
B
/ii—*/$"} over the top of the cell plates.
Replace the headlight bulbi
1 Loosen the screw on the underside
• . of the rim with a screwdriver.
1
Z . Pull out the bottom part of the
rim slightly and then lift upwards
so that the retainer catch releases
• : its grip.
3 Loosen the three screws retaining
the insert. It is not necessary to
remove these screws complete,
The insert can now be removed
by turning it in an anticlockwise
direction.
* Loosen the small springs retaining
the above holder and remove it.
Take out the bulb holder and loosen
the bulb by pressing it inwards and
turning it in a clockwise direction at
the same time. When fitting a new
bulb, remember that there are
different widths on the socket pins.
When refitting the bulb holder in
the insert make sure that the small
retainer engages in its notch.
On vehicles fitted with Sealed
Beam headlights, follow the in-
structions under pictures 1—1
and then replace the complete
unit.