DRL-Fog Light Hack

[particlewave]

Originally Posted by Troy.Boxster

I tried this hack today but came across a problem. Everything works correctly except the shield solenoid is activated (or not activated, not sure what the normal position is) so my projectors (thanks Fred!) are fully on when I turn the headlights on. Activating the brights doesn't change anything. Flashing the brights turns off the fogs when the headlights are off, so that works as expected. Has anyone with Fred's projectors had a similar experience or otherwise have an idea of what may be causing my problem? I'm assuming this has something to do with how the projectors are wired, but that's a guess.

It's because of the low load of the high beam solenoid. If you want it to work properly with the fog lights as DRLs, you'll need to add a load resistor in parallel with the high beam solenoid (the same type of load resistor used to fix LED flashers).

This fools the car into thinking that a normal bulb is in the high beam socket.

[Troy.Boxster]

Originally Posted by particlewave

It's because of the low load of the high beam solenoid. If you want it to work properly with the fog lights as DRLs, you'll need to add a load resistor in parallel with the high beam solenoid (the same type of load resistor used to fix LED flashers).

This fools the car into thinking that a normal bulb is in the high beam socket.

Thanks Charles, you are a rock star! Perhaps I'll just use the LED spars I bought as DRLs and use the fogs as my high-beam flash when I don't have the headlights on.