Charge Warning Lamp

Charge Warning Lamp












The charge warning lamp is situated in the top right-hand corner and informs the driver whether or not the generator is charging.

The lamp is supplied with current in the main instrument unit and grounded by the generator via terminal 3 (K20).

If the generator is not rotating or for some reason does not charge, the warning lamp circuit is grounded via the regulator through the generator's field winding, causing the lamp to light up. At the same time the central warning lamp lights up and, at engine speeds above 300 rpm, the MIU sends a request to the SID for activation of an acoustic signal.

When the generator is charging, its D+ and B+ terminals will have the same voltage. Both terminals of the warning lamp will then be supplied with this same voltage and the lamp goes out.

Connected in parallel with the lamp is a resistor which ensures that the generator receives its magnetizing current when starting, even if the lamp bulb is faulty.

A diode is connected in series with the resistor and the lamp. This diode prevents the lamp from lighting up when high charging currents are generated.

Diagnostics
The function has no diagnostics.