Weired Problem with The Rear Window, help please :S

Hi,

I have a bit of a weired prob with my freelander. I recently fitted A HID Xenon Headlight kit. That works a treat but since i installed it i have a had a weired problem.

When i turn on the new HID headlights the rear window just opens itself ?

Then sometimes when i try and raise it back up, when it reaches the top i get a warning beep from the dash and it lowers down once again.

It only does it when i turn on the headlights, if i take out the hids it doesnt do it ? does anyone know why HID's would do this to the window.

They must be somehow interfering with the ECU ?

I have tried Re-calibrating the window in hope that was the problem but it still does it when i turn on the lights.

Someone please help me out and give me some pointers ?

I dont think an auto electrician could sort this ?

Thankyou !

sorry about the double threads lol

think it's caused by the inrush current when you turn the HID lamps on. as you say, they have a ballast which charges up then strikes to cause an arc. When you first turn them on, the inrush will be many many times higher than the running current. However, the blip is so fast, the multimeter can't register it fast enough, not even with peak hold.

Although it is without a doubt the HID lamps causing this (you have proved it by changing the lamps back) the battery may well be exacerbating this problem. If your battery is in a poor condition, it might dip when the lights are first switched on, then the ecu will register battery disconnected, then the inrush current passes and the battery recovers, so the ecu then registers battery reconnected and drops the rear window.

Might be worth trying a new battery to see what happens. Other members of this forum (stownrow to name but one) have fitted HID lamps to their freelanders with no adverse effects.