Norton Commando Workshop Manual

## Electrical

# J

### SECTION J18

### STOP SWITCHES

Front Brake Stop Switch (Drum Brake)
This is a sealed compression switch fitted into the front cable which cannot be serviced. Check periodically on the cleanliness and security of the spade terminals.
Front Brake Stop Switch (Disc Brake)
A sealed Lucas compression switch is incorporated in the master cylinder. This unit cannot be serviced though a check shouid be made periodically on the cleanliness and security of the lead terminals.
Rear Brake Stop Switch - Lucas Type 118SA
The switch is a sealed unit though the rubber shouid be liftod and filled with grease at intervals to exclude water. It is mounted by screws in slots to allow for position adjustment.
Rear Stop Switch Adjustment
Care must be taken during adjustment since incorrect positioning causes the plastic switch to function as the brake pedal stop, resulting in failure of the switch body. Slacken the nuts and screws holding the switch to the plate with slots on the brake pedal. Set the rear brake pedal to suit the riders preference - this is done by adjustment of the stop bolt and locknut. Adjust the rear brake cable to the desired setting. Move the switch up, a little at a time, until the switch plunger is central to the abutment and until the least depression of the pedal causes the stop light to illuminate. The recommended switch depression is 1/32 in. (0.0793 mm). Tighten the switch securing screws and allow the pedal to return to rest, ensuring that the switch is not fully compressed before the pedal stop is reached.

### SECTION J19

### HANDLEBAR SWITCH CLUSTERS

(1971 and later Models)
The switch clusters are accommodated in light alloy castings. Whilst the switches are not sealed units, the method of assembly renders reassembly by an owner or dealer extremely difficult, if not impossible, and we must recommend against attempts at dismantling.

The left switch cluster includes, at the top, the kill (or cut-out) button and a spare button at the bottom. The 3 - position flick switch operates the direction indicators which are available as optional extras. The switch functions as below:
1 | With the lever in the central position and no buttons being pressed, the only leads connected are the White and White/Yellow. This is because the upper push button operates a normally closed (i.e. push to open) switch.
2 | Pressing the upper push buttons opens the White White/Yellow leads (Ignition cut-out).
3 | Pressing the lower push button connects the White lead to the White/Red lead. This button has no function at the present.
4 | Moving the switch lever to the lower position connects the light Green/Brown lead to the Green/Red lead (L.H. indicators where fitted).
5 | Moving the switch lever to its upper position connects the light Green/Brown lead to the Green/White lead (R.H. indicators where fitted).
The right hand switch cluster accommodates the horn button (at the top), the headlamp flasher at the bottom and the two position dip switch. The headlamp flasher permits the headlamp to be flashed as an overtaking warning when the lights are not switched on.
The lever on this switch has only two positions, upward and horizontal.
1 | With the switch lever in the horizontal position and no buttons being pressed the only 2 cables connected are Blue and Blue/Red (Dip beam).
2 | Moving the lever to its lower position connects the Blue lead to the Blue/White lead (Main beam).
3 | Pressing the upper button connects the White lead to the Purple/Black lead (Horn).
4 | Pressing the lower button connects the White lead to the Blue/White lead (Headlamp flasher).
Note: These clusters may easily be reversed from side to side depending upon owner preference.

### SECTION J20

### POWER TAKE-OFF SOCKET

(1971 and later Models)
This is located on the front of the airbox or on 1972 models, on the right side of the battery carrier, and provides a power source for any accessory selected by the owner, providing the battery capacity is borne in mind. With the battery in good condition and fully

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