MG MGA Twin Cam Workshop Manual page 16

GENERAL INFORMATION
continued
Direction indicator switch
The lever-type switch on the outer edge of the panel controls the flashing indicator unit. The unit will operate only
while the ignition is switched on, and flashes the sidelamp and tail lamp on the side of the car to which the switch lever
is moved until it is automatically switched off.
While the flashing unit is switched on the warning light next to the switch will show green.
Fuel gauge
This operates only when the ignition is switched on.
Choke or mixture control
To enrich the mixture and assist starting when the engine is cold pull out the knob marked 'C' and lock it in position
by turning it anti-clockwise. Turn the knob clockwise and push it inwards to the normal running position as soon as the
engine is warm enough to run without the rich mixture.
Never allow the engine to run for any length of time with the knob pulled out.
Ignition switch
The fuel pump and gauge are brought into action by this switch, which is also the master switch for the windshield
wipers and direction indicators.
Windshield wiper switch
The windshield wipers are self-parking and operate only when the ignition is switched on.
Pull out the control 'W' to set the wiper blades in motion. Push in the knob to switch off the motor and park the
blades.
Map-reading lamp
The map-reading lamp is controlled by the adjacent knob, which must be pulled out to switch on the light. The
lamp will only operate while the sidelamps are switched on.
Windshield washer
When windshield-washing equipment is fitted it is operated by the knob marked 'Push' below the fuel gauge.
HEATING AND DEMISTING EQUIPMENT
The 2·75-kw. heating and demisting unit is fitted as an extra to standard equipment.
Fresh air is ducted from the radiator grille to the heating element and blower motor mounted bdow the bonnet.
Water from the engine cooling system is used to heat the element.
Warmed air issues from the toeboard or the windshield demisting vents according to the position of the controls
mounted below the instrument panel.
Air
The left-hand knob controls the air supply. When the knob is pushed in the air duct is open and air at atmospheric
temperature will enter the car when it is in motion and will issue from the toeboard or demisting vents.
Air blower
Pull out the knob marked 'B' on the temperature control lever to switch on the blower motor, and this will increase
the flow of air into the car and may be used to give a supply of air when the car is stationary or travelling at low speed.
The blower will only operate when the ignition is switched on.
If the blower motor is switched otT and the air control knob is pulled outwards to close the air duct fresh air cannot
enter the car from the toeboard or windshield vents.
General Information 4