I just did that and they don't come on. I'm assuming it's not going to work then.It's a five minute task to remove one old lamp and fit the new one, so try that first to see if it works.
As V50R asked, depending on which units you have for replacement, might be what needs figuring out.
This might be good info for you http://www.volvoforums.org.uk/showthread.php?t=233813
Thanks. I'll check that out.Yea, the look is of the HID assembly is way cleaner. I agree.
Below is the link of the ones I bought, they have a year warranty, which I liked. I have had them in for a few weeks, zero problems and they make the car look 10 years newer. Night driving is literally 2x to 3x brighter. I'm usually not impressed with aftermarket upgrades but these blew away my expectations.