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Numbered objects on the wiring diagram:
The table here below started as a copy of the printed list of keys that came with the original wiring diagram. But that drawing contains several numbered items that were not explained in the original key list. A handful of those have been added to the list below, if I came across them and was able to identify them myself. But a few numbered items stay unexplained. Also, there are unnumbered (and unexplained) items in the drawing (e.g. look to the left of item 37) and there are even a few items missing entirely (such as the Lucas 3AW warning light control unit (Ignition Light Relay) and the 4TR battery regulator).
But please note that very early cars (until spring 1972 approx.) had a Lucas 11AC alternator which used a separate 4TR output regulator box, and after that aLucas 20ACR alternator was fitted which had a built-in regulator system. This is probably the reason that the 1970 wiring diagram does not show that separate 4TR regulator.
A strategy that has worked for me is: consult the 1986/1990 wiring diagram, which is also on this web site. Although the numbering is totally different from this 1970 version, the basic structure of the drawing is the same: many low level differences, many high level similarities. You then benefit from the fact that that 1986/1990 key list has fewer omissions.
As an aid in finding the various objects in the drawing, I have added coordinate values for each one. The coordinate system has its origin in the lower left corner of the drawing, and the values are Hor/Vert percentages. E.g. 50/50 is the centre of the drawing, and 100/75 is on the right side, ¾ up from the bottom.
| # | Hor%/Vert% | Description |
| 1: | 2/89 | Alternator |
| 3: | 15/68 | Battery |
| 4: | 9/89 | Steering lock switch |
| 5: | 2/68 | Starter motor |
| 6: | 19/61 | Lighting switch |
| 7: | 14/38 | Dipper switch (under left foot of driver) |
| 8: | 5/51 | R.H. Headlamp (outer) |
| 9: | 5/40 | L.H. Headlamp (outer) |
| 10: | 5/55 | Main beam warning lamp |
| 11: | 5/30 | R.H. side lamp |
| 12: | 5/25 | L.H. side lamp |
| 13: | 13/12 | Panel lamp switch |
| 14: | 5/1, 20/1, 20/5, 20/8,
33/1, 33/4, 33/7, 33/9 | Panel lamps |
| 15: | 5/15 | Number plate lamps |
| 16: | 5/22, 60/44 | R.H. stop/tail lamp (obviously, the one drawn at 5/22 is erroneous) |
| 17: | 5/19, 60/47 | L.H. stop/tail lamp (obviously, the one drawn at 5/19 is erroneous) |
| 18: | 71/44 | Stop lamp switch |
| 20: | 30/60, 28/54, 36/54, 29/47, 34/47 | Interior lamps (highest one is driver's compartment) |
| 21: | 34/49, 36/58 | R.H. door switch (highest one is front door) |
| 22: | 28/49, 30/58 | L.H. door switch (highest one is front door) |
| 23: | 45/76, 45/79 | Horns |
| 24: | 52/76 | Horn push |
| 25: | 75/13 | Flasher unit |
| 26: | 72/6 | Direction indicator switch |
| 27: | 70/1, 70/11 | Direction indicator warning lamps |
| 28: | 60/11 | R.H. front flasher lamp |
| 29: | 60/1 | L.H. front flasher lamp |
| 30: | 60/8 | R.H. rear flasher lamp |
| 31: | 60/5 | L.H. rear flasher lamp |
| 32: | 72/22 | Two-speed heater fan motor switch on dashboard. The heater switch in the rear seems to be forgotten. |
| 33: | 60/19, 60/22 | Heater motors (front). The heater motor for the rear seems to be forgotten. |
| 34: | 64/58 | Fuel gauge |
| 35: | 60/61, 60/65 | Fuel tank units (on my 1971 model: empty tank resistance 260 Ω, full tank 18 Ω)(yellow subcolour for left, blue subcolour for right) |
| 36: | 59/83 | Windscreen wiper switch [in drawing: unnumbered, but drawn between numbers 44 and 77] |
| 37: | 68/83 | Windscreen wiper motor (located behind the battery (RHD)) |
| 38: | 14/92 | Ignition switch (with key) |
| 39: | 83/89 | Ignition coil |
| 40: | 90/83 | Distributor |
| 41: | 60/69, 60/72 | Fuel pumps (located on top of the rear wheel arches) (yellow subcolour for left, blue subcolour for right) |
| 43: | 69/51 | Oil pressure gauge |
| 44: | 58/89 | Ignition warning lamp |
| 45: | 20/42 | Headlamp main beam flash switch (on steering column with direct.indic.handle) |
| 46: | 64/55 | Water temperature gauge |
| 47: | 60/55 | Water temperature transmitter (located behind the thermostat, in the bottom of the inlet manifold, under the Otter switch. A new one I bought had 0.65 Ω at room temp.) |
| 50: | 82/44, 82/47 | Reverse lamps |
| 53: | - | Fog lamp switch [number not present in drawing; drawing suggests that switch is integrated in no. 6] |
| - | 32/23 | Sidelamp warning light (if fitted) [in drawing unnumbered, but drawn above 54] |
| 54: | 32/19 | R.H. fog lamp |
| 55: | 32/15 | L.H. fog lamp |
| 56: | 27/79 | Clock |
| 57: | 29/44, 33/79, 34/44 | Cigar lighter (3 drawn) |
| 58: | 16/80 | Starter push switch |
| 59: | 30/63 | Interior lamp switch ("Map" toggle on dashboard) |
| 60: | 31/69 | Radio |
| 61: | 38/91 | Horn relay [in drawing: unnumbered, but drawn to the right of the lowest horn 23] (located inside the front wheel arch, next to the 4TR regulator unit and the 3AW warning light control unit) |
| 64: | 68/55 | Voltage stabiliser (located inside the centre part of the dashboard) |
| 67: | - | Line fuses (see fuse list below) |
| 76: | 5/62 | Automatic gearbox selector lamp |
| 77: | 59/76 | Windscreen washer |
| 78: | 65/76 | Windscreen washer switch |
| 93: | 29/73 | Inspection lamp and charging socket (under the bonnet near the battery) |
| 95: | 82/37 | Revolution counter |
| 113: | 5/47 | R.H. headlamp inner |
| 114: | 5/44 | L.H. headlamp inner |
| 115: | 82/68 | Rear window demist switch |
| 116: | 93/72 | Rear window demist unit |
| 131: | 68/30 | Combined reverse switch and automatic gearbox safety switch (located on the steering wheel column on the opposite side of the steering wheel lock) |
| 140: | 67/64 | Fuel tank changeover switch (yellow subcolour goes left, blue subcolour goes right) |
| 146: | 11/85 | Battery charge/decharge gauge |
| 147: | 62/51 | Oil pressure transmitter (located near the oil filter under the engine) |
| 150: | 80/66 | Rear window demist warning light |
| 152: | 94/22 | Hazard warning lamp |
| 153: | 85/14 | Hazard warning switch |
| 154: | 86/21 | Hazard warning flasher unit |
| 165: | 83/76 | Handbrake switch (located near the foot of the handle, rear side) |
| 166: | 83/79 | Handbrake warning lamp |
| 182: | 90/77 | Break oil reservoir sensors (located inside the reservoir) |
| 187: | 79/60 | Air conditioning relay. The arrow pointing to fuse 4 should point straight upward instead of left |
| 188: | 87/51 | Air conditioning resistor |
| 189: | 81/52, 93/52 | Air conditioning motor |
| 190: | 89/57 | Air conditioning compressor [drawing has an arrow pointing to 190, but no actual icon] |
| 192: | 92/60 | Air conditioning control switch |
| 204: | 38/91 | Ignition protection relay (located behind the dashboard behind the cubby box). This is the relay that powers the green wires. Note that one of the white wires carries a small red plastic ring, which is indicated in the drawing. |
| 209: | 5/37, 5/33 | Headlamp (outer) Dip beam |
| 211: | 30/13, 34/13 | Heater control button lights |
| 212: | 60/40 | Otter switch; behind the thermostat, in the side wall of the inlet manifold |
| 216: | 46/62 | Window lift switch front R.H. |
| 217: | 46/58 | Window lift switch rear R.H. |
| 218: | 46/31 | Window lift switch front L.H. |
| 219: | 46/28 | Window lift switch rear L.H. |
| 220: | 42/3, 42/10, 49/21, 49/28,
49/32, 51/51, 51/58, 51/62 | Window lift motor |
| 221: | 43/46 | Window lift relay |
| 233: | 46/51 | R.H. rear quarter window lift switch |
| 234: | 45/21 | L.H. rear quarter window lift switch |
| 235: | 43/43 | Division lift relay |
| 236: | 47/14 | Division window lift master switch |
| 237: | 47/11 | Division window lift switch L.H. rear |
| 238: | 47/3 | Division window lift switch R.H. rear |
| 239: | 5/5, 5/8, 5/12 | Panel edge lamps |
| 240: | 87/65 | Rear window demist relay. Actually, this is a C1/C3 type relay
(normally closed) with a permanent resistor (45Ω) over the C1/C3 gap. Its function is to dim the warning light when the car sidelamps are turned on. |
| 241: | 94/33 | Automatic gearbox inhibitor switch relay. This relay does not have a separate W2 contact, but has W2 integrated into C2. It is located behind the dashboard near the revolution counter, and is mounted on isolating pads. |
| 242: | 34/52 | 2-way interior lamp switch (actually the two switches in the rear armrest) The pull down switch under the dashboard seems to be forgotten in the diagram. |
| 243: | 67/40 | Choke solenoid (inside the carburettor) |
| - | 54/85 | ?? [in drawing unnumbered, but drawn above 24] |
Fuses on the wiring diagram (the -../..- are coordinates in the drawing as explained above):
No.1: (50 Amp.) -14/43- Headlamp Main beam
No.2: (35 Amp.) -14/34- Headlamp Dip beam
No.3: (35 Amp.) -74/84- Flashers, wipers, washers, horn relay, heater blowers
No 4: -81/92- Spare
later models added: rear cigar lighters (35 Amp.)
No 5: (50 Amp.) -42/84- Horns
later models added: headlamp flasher
No 6: (35 Amp.) -22/34- Side, tail, panel, number plate, boot lights
later models added: rear fog guard lights
No 7: (35 Amp.) -39/84- Cigar lighter, headlamp flasher, interior/map lights
later models added: door guard lights, boot light, front clock
No 8: (35 Amp.) -72/84- Reverse lights, choke, petrol, oil and water gauges, brake lights
later models added: kickdown
No 67: (in-line fuse, 20 Amp.) Hazard warning light unit (optional; value copied from the 1986/1990 diagram)
This is the no.67 at the lower right (-83/22-) of the drawing.
No 67: (in-line fuse, 15 Amp.) Heated back light (value copied from the 1986/1990 diagram).
This is the no.67 at the upper right (-79/72-) of the drawing.
No 67: (in-line fuse, 5 Amp.) Radio (value copied from the 1986/1990 diagram).
This is the no.67 at the upper left (-27/69-) of the drawing.
The large multi-connector next to the engine against the right wheel well.
This connector connects wires from the dashboard to various point on the right side of the engine. It has 7 connection points (5 used, 2 unused). On the wiring diagram these connection points are shown as two small concentric circles. From top to bottom on the connector: