Bi-Xenon

blakey75 · Post by **blakey75** » 15 Jun 2010, 14:36

I have a 2006 facelift xc90 D5 with rubbish halogen headlamps. I've purchased a pair of active Bi-Xenon headlamps, only problem is I can't get them to work. The igniter unit initially fires them & they come on for 1-2 seconds then go off & the bulb warning comes on. Has anyone any ideas??
I'm not bothered about the the headlamps moving side to side, I just want the Headlamps & main beam to work. Yhe park lights & indicators work though. Volvo uk say they can't be retrofitted as there is no software download available. I've been told an additional aftermarket ecu can be fitted to fool the vehicle into thinking that the car still has halogen lights but i'm a bit wary of fitting aftermarket hardware/software.

Shadows · Post by **Shadows** » 27 Feb 2011, 12:38

No problems.
You just have put a effectrestistane over the plus and minus to the running light.

Post by **jimmy57** » 27 Feb 2011, 16:02

Hmm, complicated. Starting in 2005 volvo changed to transistorized power supply to headlamps. Your 06 has transistorized power supply switching to headlamps and the circuit is monitored for opens and shorts. When problems are detected the CEM shuts off power supply for that key cycle.

You need individual relay power feed to each ballast for BX headlamps. The relays will be wired 30 to battery, 87 to ballast, 85 grounded, 86 is the feed originally to headlamps. The resistors will need to be between 86 and ground. The resistance will need to be approximately 3 ohms and will need to be high watt resistors. The ballasts draw much more power on initial charging than headlamps and would make the CEM sense a short and shut off power.

Shadows · Post by **Shadows** » 27 May 2011, 13:34

blakey75 wrote:I have a 2006 facelift xc90 D5 with rubbish halogen headlamps. I've purchased a pair of active Bi-Xenon headlamps, only problem is I can't get them to work. The igniter unit initially fires them & they come on for 1-2 seconds then go off & the bulb warning comes on. Has anyone any ideas??
I'm not bothered about the the headlamps moving side to side, I just want the Headlamps & main beam to work. Yhe park lights & indicators work though. Volvo uk say they can't be retrofitted as there is no software download available. I've been told an additional aftermarket ecu can be fitted to fool the vehicle into thinking that the car still has halogen lights but i'm a bit wary of fitting aftermarket hardware/software.

Did you make it work?

jbchickenhead · Post by **jbchickenhead** » 07 Feb 2016, 13:24

jimmy57 wrote:Hmm, complicated. Starting in 2005 volvo changed to transistorized power supply to headlamps. Your 06 has transistorized power supply switching to headlamps and the circuit is monitored for opens and shorts. When problems are detected the CEM shuts off power supply for that key cycle.

You need individual relay power feed to each ballast for BX headlamps. The relays will be wired 30 to battery, 87 to ballast, 85 grounded, 86 is the feed originally to headlamps. The resistors will need to be between 86 and ground. The resistance will need to be approximately 3 ohms and will need to be high watt resistors. The ballasts draw much more power on initial charging than headlamps and would make the CEM sense a short and shut off power.

Jimmy,

Just wondering if this will work? Wouldn't the initial feed to the headlamps still have PWM and cause flickering? I just got a pair of xenon projector headlights as well I tried to PM you, but I just signed up here...

Thanks in Advance!

Post by **jimmy57** » 14 Feb 2016, 23:15

The circuit is designed to stop overvoltage to lights. It is not PWM until voltage goes over 13 and then it starts PWM to lower voltage. As voltage goes up the supply on time gets lower percentage. The frequency is 70 HZ (or is it 100 HZ) and that is high enough that the relay will not care.

jbchickenhead · Post by **jbchickenhead** » 27 Feb 2016, 23:22

jimmy57 wrote:The circuit is designed to stop overvoltage to lights. It is not PWM until voltage goes over 13 and then it starts PWM to lower voltage. As voltage goes up the supply on time gets lower percentage. The frequency is 70 HZ (or is it 100 HZ) and that is high enough that the relay will not care.

No luck man. Wired it exactly this way and I am only getting flickering. I even tried using the running lights as a feed to 86 and that also did not work (flickering). I suspect its the PWM and is killing both of those power sources. Any other way you could think of to do this? Would the rear fog light have PWM as well? Was thinking I could do it that way...

Thank you in advance!