Norton Commando Workshop Manual

## Electrical

# J

charged, the maximum rating of 8 amps at the 10 hour rate is available. We recommend that the engins is run up as soon as possible after the power take-off socket has been used to restore the battery to a good state of charge.
Caution must be exercised not to discharge the battery completely. The same power socket is used for charging the battery from an outside source.

### SECTION J21

### FLASHING DIRECTION INDICATORS

Bulb replacement
To replace the bulb, unfasten the screws retaining the lens and carefully remove the lens. The bulb is then removed by pushing inwards and rotating anticlockwise. When replacing the lens, ensure that the lens body locates into the sealing gasket, before the retaining screws are tightened.
Checking for faulty operation
If a fault occurs in the system, the following procedure shouid be adopted.
1 | Check that the bulb filaments are not broken.
2 | Check that all flasher circuit connections are clean and tight.
3 | Switch on ignition and check with a voltmeter that the flasher terminal "B' is at battery voltage.
4 | Connect together flasher unit terminals "B" and "L" and operate the indicator switch. If the flasher lamps on the respective side now light without flashing, the flasher unit is faulty and shouid be replaced with the same type of unit as the original.
If a flasher lamp stalk is replaced
On reassembly, take care not to damage the green lead when passing through the screw thread of the lamp shell. Final adjustment of the lamp position must be made by tightening of the locknut and not by straining the flasher unit.

Important
When tightening the stanchion locknut against the body of the flasher lamp, ensure that the torque loading figure of 35-45 Ibs./ins. is not exceeded.
Flasher Unit Lucas Type 8FL
The unit is clipped into the mounting bracket and if for any reason the bracket is to be removed, the unit must first be withdrawn from the clip.

### SECTION J22

### ALTERNATING HORN SET INTERPOL ONLY TYPE HC3

SPECIAL NOTE: This equipment is not available in U.S.A.
The alternating horn set comprises an alternating horn control, special 9H horns, two 6Ra relays, a switch and suitable connectors. Details of the individual units are as follows:
HC 3 Alternating Horn Control
This is a transistorised multivibrator, designed to puise two 6Ra continuously rated relays alternately. The frequency of the unit is set during manufacture and cannot readily be altered. Hence the risk of faulty setting due to tampering is eliminatod. The unit must be mounted so that its temperature does not exceed 50°C. Connection polarity must be observed. The alternating horn wiring is shown in Fig. J6.
Horns
These are type 9H and have been reset after a "runningin" period to ensure maximum life. They must be rigidly mounted on a solid member of the vehicle with no loosely mounted components in the vicinity otherwise the tone will be adversely affected. It is recommended that the horns are mounted facing forward. The flares shouid be tilted slightly downwards to allow any water entering the horn trumpets to drain out.

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