Starting and Charging: Description and Operation

Starting System
Current (+30 circuit) is supplied from battery 1 to ignition switch 20 and also direct to terminal 30 on starter motor 4.

When the ignition switch is turned to the Start position, current (+50 circuit) is supplied to the actuating coil of the solenoid. The actuating coil closes the start contact, allowing current from the battery to flow through the starter motor which then starts to rotate. On cars equipped with an anti-theft alarm, current (+50 circuit) is supplied to the control module for anti-theft alarm 289 and also to starter motor inter-lock relay 452.

Automatic Transmission
Cars with automatic transmission are equipped with starter motor interlock switch 77 which prevents the engine from being started when the selector lever is in position 1,2,3, D or R.

Charging System
The charging warning lamp informs the driver whether the generator is charging the battery or not.

When ignition switch 20 is in the Drive position, positive current (+15 circuit) is supplied via fuse 13 to charging warning lamp 47e in the main instrument display panel and then on to generator 2.

When the generator is not rotating or if it is not charging for some reason or other, the charging warning lamp circuit will be grounded through the generator and the warning lamp will light up.

When the generator is charging the battery, terminal D+ is supplied with the same current as B+.

The charging lamp will then be supplied with the same current on both terminals. The lamp will then go out.

IMPORTANT: Since the field excitation of the generator is built up through the incandescent bulb, the bulb rating (2W) must not be changed.

To increase field excitation additionally, a resistor is connected in parallel with the bulb. A diode, which blocks reverse currents, is connected in series with the charging warning lamp.