P5 3 MkII Electrical

The positive earth 12-volt battery is located in the luggage hoot at the right-hand side under a metal cover.
Every 3,000 miles (5.000 km) check the battery level as follows:-
1. Remove cover by releasing the securing clips.
2, Wipe all dirt and moisture from the battery top.
3, Remove the filler plug from each cell in turn. If necessary add sufficient distilled water to raise the level to the top of separators. Replace the filler plug. Avoid the use of a naked tight when examining the cells.
4. Replace cover and retain by means of the clips.

In hot climates it will be necessary to top-up the battery at more frequent intervals.

In very cold weather it is essential that the vehicle be used immediately after topping-tip, to ensure that the distilled water is thoroughly mixed with the electrolyte. Neglect of this precaution may result in the distilled water freezing and causing damage to the battery.

Every 6,000 miles (10.000 km) clean, grease and tighten the battery terminals,

Current-voltage control box
The current-voltage control, fuse units, fuse and junction boxes are housed on the engine side of the scuttle.

The cut-out and regulator in the control box are set on initial assembly and must not be tampered with; the protecting cover is therefore sealed.

Fuse box and fuse units

The fuse to terminals numbered 1 and 2 protects the accessories which are connected, so that they operate when the ignition is either on or off; these are clock, map light and interior lights.
The fuse to terminals numbered 3 and 4 protects the accessories which are connected, so that they operate only when the ignition is on; these are windscreen' wipers, heater, direction indicators, stop lights, petrol level gauge, petrol reserve switch and reverse light. The instrument panel lights are protected by a 3 amp. fuse contained within the plastic fuse unit clipped to the harness above the main fuse box.
Fuse box and fuse units

Windscreen wiper motor and heater are also wired through the auxiliaries switch and can be used with the ignition switch in that position.

All other components are not fused. Use only 35 amp. cartridge type fuses for all replacements with the exception of the panel light fuse, which is a 3 amp. fuse. Two spare 35 amp. fuses are housed in the main fuse box.

The fuse unit for the overdrive unit is situated below the main fuse box.

A blown overdrive unit fuse is indicated as follows
(a) When in normal, unable to engage overdrive.
(b) When in overdrive, the unit will re-engage normal drive irrespective of throttle opening.

35 amp. cartridge type fuses must be used for all replacements on the overdrive circuit,

To renew a cartridge type fuse contained within the fuse unit, push the cap inwards and turn anti-clockwise, Withdraw cap and change fuse as necessary. Replace cap, push fully in and turn clockwise to secure,


The headlamps are mounted in the wings; to replace a unit or a bulb insert a screwdriver under the rim at the bottom centre and gently lever off the rim; this is the only place where a screwdriver may be inserted without possible damage to the paintwork.
Remove the dust excluder retained by three recessed head screws. Sealed beam type: Withdraw the headlamp unit and disconnect the plug at the rear. Replace the unit and seassemble. Replacement bulb type: Press in the light unit against the tension of the springs on the three adjustment screws, turn it anti-clockwise and withdraw. Release spring dips and move bulb holder; the bulb can then be replaced and the unit reassembled. All types: Ensure that the headlamp rim is pushed right on to the retaining clips.

Replacement units:
Headlamps (R,H.D. models): Lucas Sealed Beam, 12 V., 60/45 double filament (dip to left).
Headlamps (L.H.D. models except North America and Europe); Lucas No. 417, 12 v., 60/40 double filament (dip to right).
Headlamps (Europe except France): Lucas No. 410, 12 V,1 45/40 double filament (duplo) (vertical dip).
Headlamps (France): Lucas No. 411, 12 V., 45/40 (duplo, yellow).
Headlamps (North America): Special 12 v.

Headlamp setting
Check the headlamps every 6,000 miles (10.000 kin). They should be set so that the main driving beams are parallel with the road surface. If adjustment is required, remove the rim as described above. The vertical setting can then be made by turning the screw at the top of the lamp and horizontal adjustment by means of the screw at the side of the unit.

In order to adjust headlamps, using a beam setting board, proceed as follows:
1. Mark on the board the dimensions shown in sketch and position the car, unladen, on level ground.
2. Place the board 12 ft. (365 cm) in front of the headlamps, ensuring' that it is at right angles to the car centre line and that the centre line on the board is in the same plane as the car centre line.
3. Adjust the beam by turning the adjusting screws until the area of concentrated light corresponds with the marks on the beam setting board.

Side lamps
The side lamps are mounted in the front wings. When switched on, the small red side lamp indicator above the lamp can be seen from the driver's seat. To replace bulb: turn the rim in an anti-clockwise direction, and withdraw complete with lens. Renew the bulb, ensure that the washers are in position and refit the lens and rim.

Replacement bulbs-Lucas No. 222, 12 v., 4 w.
Side lamp

Rear lamps
The rear lamps combine tail light, stop light and direction indicator light.
To replace bulb:
1. Remove retaining screw and lift off the rim.
2.Remove appropriate lens; upper amber for the direction indicator lights, lower red for the
stop-tail light. Renew bulb.
3. To replace, locate the lens in the rubber bead.
4. Slip the rim over the retaining clip at the top and replace the securing screw. Ensure that the rubber bead fits snugly round the rim.
Rear lamp
Replacement bulbs:
Stop-tail lamp: Lucas No. 380, 12 v., 21/6 w.
Indicator tamp: Lucas No. 382. 12 v., 21 w.

Direction indicator lamps
Flashing type indicators with amber lens are fitted as standard equipment.
The forward facing lamps are located at the outside edge of the front wing below the side lamps, while at the rear flasher bulbs are contained in the rear lamps. A special unit in the circuit causes either the left-hand or right-hand lamps to flash when the steering column control is operated.
To change a bulb proceed as follows:
Front indicator lamps
1. Remove the retaining screws and withdraw the lens.
2. Renew bulb and replace lens, securing with the retaining screws.
Front indicator lamp

Rear indicator lamps
Proceed as for rear lamp above.

Replacement bulbs:
Front indicator lamp: Lucas No. 382, 12 V., 21 w. Rear indicator lamp: Lucas No. 382, 12 v., 21 w.

Rear number plate illumination and reversing lamp
The rear number plate illumination lamp is mounted on the boot lid above the number plate.
The two o~ter bulbs illuminate the number plate when the main lamp switch is on; the centre bulb, operated automatically by the reverse gear mechanism, provid~s a rearward light when reversing.
To replace a bulb:
1. Remove two retaining screws and lift off top cover.
2. Remove lens.
3. If necessary, slightly withdraw hi lb holder and replace bulb as required.
4, Push bulb holder into position, replace lens and retain by means of the top cover and securing screws.
Rear number plate illumination and reversing lamp

Replmernent bulbs:
Number plate illumination lamp: Lucas No, 222, 12 v., 4 w,
Reversing lamp: Lucas No, 382, 12v., 21w.

Bonnet lights, Coupé models

To change a bulb proceed as follows
1, Remove the two retaining screws and withdraw the plastic dome.
2. Renew bulb and replace dome, securing with the retaining screws.
Bonnet light, coupe models

Replacement bulb, bonnet lights: Tex SP No. 209, 12 v, 6 w.

The illumination bulb can be replaced as follows:
1. Slacken screw beneath clock at underside of facia rail and withdraw clock.
2. Withdraw the rubber cover and bulb holder from the rear of the clock body.
3. Renew the bulb.
4. Replace the clock by reversing the sequence of removal operations.
Replacement bulb, clock illumination: Lucas No. 281, 12 v., 2w.
Clock bulb replacement

Interior lights
Each front interior light is switched on automatically when the appropriate door is opened and extinguished when the door is closed, but both rear interior lights are switched on when one of the rear doors is opened, and extinguished when the door is closed.
They can be controlled manually by means of a small switch on top of light.

To replace a bulb:- Front and rear lights
1. Remove retaining screws and withdraw cover complete.
2. Renew bulb.
3. Replace cover and tighten screws.
Replacement bulb interior lights: Lucas No, 254, 12 v., 6 w.
Front nad rear light bulb replacement

Borg-Warner indicator plate illumination bulb
1. Remove the bulb holder complete with cover plate from shroud.
2. Renew bulb.
3. Clip bulb holder back on the shroud.
Replacement bulb, Lucas No. 28O 12v., 1.5 w.
Borg-Warner indicator plate illumination bulb replacement

Instrument panel and warning light bulbs
Access to the instrument panel illumination and warning light bulbs is gained by swinging the instrument panel upwards. This is effected by removing the two screws from the underside of the panel. The bulbs can then be renewed as necessary.

Replacement bulbs:
Warning and instrument illumination light bulbs, Lucas No. LU 987, 12v., 2.4 MES.
Panel plate light bulbs, Carr Fastener No. 82/036, 12v., 1,2w.
Panel and warning light bulb replacement

Additional instruments, Coupé models
The illumination bulb can be replaced as follows:
1. Slacken screw beneath instrument and withdraw unit.
2. Withdraw the rubber sleeve and bulb holder from the rear of the instrument body.
3. Renew bulb,
4. Replace the instrument by reversing the sequence of removal operations.
Replacement bulbs, Lucas No. 982, 12 V., 2.2 w.
Instrument bulb replacement, Coupe models