This has me stumped, I hope somebody can help. My truck is an 2003 XLT Supercab 4.0L

I ordered on of those HID conversion kits. Here is a quick description of the system:

Each bulb sits in an actuator that moves the entire bulb in and out for high/low beams
Each bulb has a ballast/igniter
There is one relay/controller box which uses one of the original headlight sockets for a signal to turn the ballasts on and signal for the actuators. This box also takes power directly from the battery for the ballasts.

I wired it all up, turned it on, and the bulbs are in "high beam" mode (sticking out). I looked on the dash and the high beam indicator is dimly lit, not full brightness but is for sure on a little. Also, the fog lights won't turn on. If you try the high beams, the indicator glows its normal brightness but all else remains the same. With a test light I tested the both the wires for high beam and low beam, they both have power.

Here is where it gets weird. Remember, one of the original bulb sockets (drivers side) is connected to the relay box, the other (passenger side) is not plugged into anything. When I leave everything the same (as described above) and then plug the original bulb into the passenger socket, everything works great. The HID bulbs pop in and out for high/low beams, the fog lights work in low beam, everything is great except I have a lit bulb hanging under my hood.

Any help would be great. I am pretty comfortable with most things electronic, but this one has me stumped. Any wiring diagrams or help would be great. Thanks in advance!

 

you have them wired wrong, they need to be wired from left to right
White, Black, Red




And welcome fellow Oregonian!

 

Same exact result as before.

It is as if the system needs to see a load on both bulb sockets in order to function properly. The problem is coming from the car, not the kit.

This morning I disconnected the high beam wire from the circuit completely. This means that the only connection to the original harness is LB+ and GRND. I then turned on the low beams, same result as before.

Unless somebody comes up with a better idea, I am thinking of wiring the empty (passenger side) bulb socket from the factory harness to the coil circuit of a standard relay. May thought is that the relay may provide enough load to mimic the result I have with the bulb.

 

check your grounds, if they are OK try running a resistor in the other socket. If all else fails trace your wiring back and see if you can find a bad connection.
All I have for a diagram is what is in my Haynes manual and it isn't very helpful. Your description of the highbeam indicator glowing dimly when in low points to a ground issue as it is tied into the light green and black wire fed from fuse 33. You could also check the ground for the fog light relay/switch as it is tied into the headlight circuit and it could cause the dim highbeam issue if it isn't a good contact.
Like I said all I have is the Haynes manual but try pulling fuse 4 and see what happens and then fuse 8 these two are what feed the lowbeams.
I'll see if I can find a better schematic.