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In this episode, we will install DRL (daytime running lamps) in an old Alfa Romeo 159.
For this, we will use a pair of 1156 66SMD 2-color LED (White - Amber) turn signal bulbs, and one DRL controller module.
Each DRL bulb consumes only 0.25A @ 14V
14V * 0.5A =7W total electrical consumption ( *VS 140W* if you use your default headlights during daytime)
The signal LED are connected in series with an external 50W 6 Ohm resistor.
They consume 1.5A * 14V = 21W (same power with the old halogen bulbs, therefore the same behavior @ the signal relay)
The DRL
are automatically engaged, when the engine starts and the voltage exceeds 13V
are dimmed automatically when the parking lights are engaged. (night mode)
are disengaged when the engine stops
are disengaged when a signal light is engaged