C30 Electrics : - C30 headlight not working

Tabbiss · Mar 1st, 2021, 21:21

Hi everyone, I’ve got a 2009 Volvo C30 that’s been converted to run xenon bulbs and the driver side dipped beam doesn’t work. I’ve swapped the headlight units around and found that that it will work when plugged into the other side of the car. I’ve read about relays failing in the CEM which could cause this. I want to test the wiring loom to the headlight before I spend a load of money getting the CEM replace. Does anyone know the relevant PIN numbers in the plug for the headlight unit and the plug for the CEM?
Any help with PIN numbers would be appreciated or any other ideas about what’s gone wrong.

dennisl1 · Mar 3rd, 2021, 15:55

I had the same problem on my C30. the nearside Xenon dip beam failed. it needed the control unit that is tucked away behind the wheel arch liner replaced. Unfortunately they are not cheap.

LizardOfBodom · Mar 4th, 2021, 14:57

Quote:

Originally Posted by Tabbiss

Hi everyone, I’ve got a 2009 Volvo C30 that’s been converted to run xenon bulbs and the driver side dipped beam doesn’t work. I’ve swapped the headlight units around and found that that it will work when plugged into the other side of the car. I’ve read about relays failing in the CEM which could cause this. I want to test the wiring loom to the headlight before I spend a load of money getting the CEM replace. Does anyone know the relevant PIN numbers in the plug for the headlight unit and the plug for the CEM?
Any help with PIN numbers would be appreciated or any other ideas about what’s gone wrong.

Are the ballasts and igniters tucked inside headlights? If its HID conversion it has spearate wiring for xenons, did you plug the headlamp to another side but maybe didnt swap the ballasts?
If ballasts are defo ok and its really just one side of headlight (that is really odd, never heard of this issue on halogen cars before), is the whole light plug dead or long beams and parking lights still work?

Quarryscapes · Mar 8th, 2021, 11:45

Find the ballasts, swap them from side to side to rule them out. Not sure where they'll be, as I understand it C30s aren't simple to fit aftermarket HIDs in, and the factory OEM ones are even more aggro!

Mar 1st, 2021, 21:21	#1
Tabbiss New Member Last Online: Mar 1st, 2021 21:21 Join Date: Mar 2021 Location: Lostwithiel	C30 headlight not working Hi everyone, I’ve got a 2009 Volvo C30 that’s been converted to run xenon bulbs and the driver side dipped beam doesn’t work. I’ve swapped the headlight units around and found that that it will work when plugged into the other side of the car. I’ve read about relays failing in the CEM which could cause this. I want to test the wiring loom to the headlight before I spend a load of money getting the CEM replace. Does anyone know the relevant PIN numbers in the plug for the headlight unit and the plug for the CEM? Any help with PIN numbers would be appreciated or any other ideas about what’s gone wrong.

Mar 3rd, 2021, 15:55	#2
dennisl1 VOC President Last Online: Yesterday 17:47 Join Date: Dec 2004 Location: Okehampton	I had the same problem on my C30. the nearside Xenon dip beam failed. it needed the control unit that is tucked away behind the wheel arch liner replaced. Unfortunately they are not cheap.

Mar 8th, 2021, 11:45	#4
Quarryscapes Junior Member Last Online: May 5th, 2022 16:52 Join Date: Sep 2020 Location: Dolgellau	Find the ballasts, swap them from side to side to rule them out. Not sure where they'll be, as I understand it C30s aren't simple to fit aftermarket HIDs in, and the factory OEM ones are even more aggro!

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