15-10-2024, 09:27 PM
Hi
For the slightly later CW model, Lucas quote 3 to 4 amps for normal operation (wiper on wet screen) rising to 4.4 to 5.5 Amps stalled. Taking 4 Amps, that needs 1.5 ohms to drop 6 volts as Andrew notes above.
The resistor dissipation will be about 10 Watts, a "metalclad" type needs to be bolted to some metalwork to take the heat away.
For the slightly later CW model, Lucas quote 3 to 4 amps for normal operation (wiper on wet screen) rising to 4.4 to 5.5 Amps stalled. Taking 4 Amps, that needs 1.5 ohms to drop 6 volts as Andrew notes above.
The resistor dissipation will be about 10 Watts, a "metalclad" type needs to be bolted to some metalwork to take the heat away.