[justin240s14]

Originally Posted by dbeiler

If your HID lights turn off when you hit the high beams, it's because the circuit hasn't been wired completely.

The stock 240sx low beam bulb has 3 terminals. Terminal 1 is high beam power. Terminal 2 is ground. Terminal 3 is low beam power. When your lighting stalk is set to low beam, the light bulb receives 12v power on Terminal 3. When you switch to high beam, the lighting stalk CUTS power to Terminal 3 and sends 12v power to Terminal 1 instead, along with 12v power to the high beam bulb. On high beam setting, both high and low beams should be illuminated.

This is why HIDs will cut off when you hit the high beam. Because HIDs have only 1 power wire, most people will connect that wire to the low beam side only (Terminal 3)

To function correctly, the HIDs power wire must be connected to both high and low beam power wires (Terminal 1 and 3)
It is important to use a diode when connecting to the high beam side. Otherwise, the 12v power would backfeed and the high beams would be illuminated when the lighting switch is set to low beam. High beams and HIDs would both always been on regardless of switch position.

Hopefully I explained that in an understandable way. Long story short; to get your HIDs to stay on when you switch to high beam, connect the HIDs power wire to your high beam side (Terminal 1) using a diode in the circuit. It's actually a lot more simple than it sounds.

Good info......but im not using hids im just using H1s that goes into the light socket.....