2001 V70 Bulb Failure Dipped Beam -bulb, fuse, relay ok

skaupert · Post by **skaupert** » 27 Nov 2014, 08:15

So I have this wretched failed low beam problem, where the light is out, and it's not the bulb, fuse, or relay. There is no power to the socket for the left hand low beam fuse. No power to the light (I've read all I could find, know that there are multiple fuses, checked them all. Checked and exchanged the bulb. Checked and swapped out relays. No difference.)

There was no 'event' that would give any clue as to why it stopped working. On a dry, typical fall day, I took the car out three times. When I started the car for the third drive, the left low beam had stopped working. Bulb is a Sylvania, and less than 2 years old. I always drive with the headlights on.

I'm now looking for a diagram that shows me what each of the relays and shunts on the CEM are for. (the only info I found identifies just the low beam relay and shunt) I'm also looking for a reference that would allow me to test the CEM itself for broken solder points, or issues with its chips.

Thanks in advance for any pointers and/or reference material. I'm also wondering if anyone knows of a service bulletin about this issue that might be of further help.

Thank you!

draser · Post by **draser** » 29 Nov 2014, 09:53

Can you check fuses 22, 23 in. cem, see diagram?

skaupert · Post by **skaupert** » 29 Nov 2014, 10:02

Will do! Had no idea there were fuses in there. Thank you, will report back!

adrian22 · Post by **adrian22** » 03 Oct 2016, 11:17

I have same problem in my car S60 2006
can you indicate where are the relays for the low beam headlights?
Thanks

93SCMax · Post by **93SCMax** » 03 Oct 2016, 14:58

skaupert,
Double check your electrical connector going into the light bulb. I've had this issue a couple of times and had to change out the connector to make the issue go away. With the heat generated in the engine compartment, it degrades the connector and likely turns into an electrical ground or connection issue. Check your relays and fuses, but I'll bet it's a connection. Connectors are cheap, but you will need to do a little splicing. Good luck!

adrian22 · Post by **adrian22** » 03 Oct 2016, 18:20

I dont have power at the fuse socket coming from the Relay
But could not find the relay -I am afraid it is embedded in the CPU electrical board