Headlight DRL's run on a reduced voltage to lower the brightness of the incandescent bulbs in DRL mode. May not be enough voltage to fire up the LED's.
DRL lights not working.
- Thread starter mojoe
- Start date
yeah 6-9v not enough to fire up the LED drivers.
This car runs the bulbs in series for DRL, so each bulb gets 6 volts. Also the polarity of one of the bulbs reverses between DRL and high beam modes.
Resistors will not help here. Load resistors are for turn signals and brake lights so the lower current of the LED will not trigger the car's burned out bulb detection. Wasting current with a resistor in parallel with the LED replacement increases the total circuit current back to what is normal for an incandescent bulb.
Resistors will not help here. Load resistors are for turn signals and brake lights so the lower current of the LED will not trigger the car's burned out bulb detection. Wasting current with a resistor in parallel with the LED replacement increases the total circuit current back to what is normal for an incandescent bulb.
in this situation yes
My 2006 tundra had a grey-silver box on the LH side of the bay, mild heat fins on it. It was a resistor that made DRL happen by running the main beams through the resistor, (power limiter), which provided the hibeam filaments at basically reduced voltage. LEDS may or may not work with that.
Consider an HIR conversion if you can, google it. Halogen lamp, same filament placement. Less glare into traffic.
Consider an HIR conversion if you can, google it. Halogen lamp, same filament placement. Less glare into traffic.