Charging indicator lamp
| Charging indicator lamp |
The charging indicator lamp tells the driver whether the generator is producing voltage or not.
When the ignition switch is in the drive position (ON), B+ is fed to the charging indicator lamp in the main instrument unit and then on to the generator.
When the generator is not rotating or if it is not charging the battery, the charging indicator lamp circuit will be grounded through it, causing the lamp to light up.
When the generator is charging, the D+ terminal receives the same voltage as B+. The charging indicator lamp will then receive voltage on both sides and the lamp will go out.
| Important | ||
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As the generator's excitation is built up through the bulb, its rating (2W) must not be changed as this will affect the exciting voltage. |
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To increase the field excitation even more and prevent it from disappearing completely if the bulb should break, a resistor is connected in parallel with the bulb.
A diode is connected in series with the charging indicator lamp to prevent the bulb from glowing at high charging currents.
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