fog light relay for 2007 V70?

pronouncedeyen · Post by **pronouncedeyen** » 02 Oct 2021, 15:05

Hi. I just finished up installing the Volvo fog lights in an '07 V70 that didn't have them (thank you Volvo for leaving the wires there for me). I added the button to the headlight switch as well. My question: is there a fog light relay and if so, where is it? I don't see a spot for it in the fuse panels in the engine, the trunk, or the left side of the dash. I haven't yet removed the CEM fuse panel but I don't see a spot for it in there either.

Does it have a relay? FCP Euro sold me this one: https://www.fcpeuro.com/products/volvo- ... 0986332021

so I'm assuming the answer is yes but maybe that's for a different model year. I believe the wiring is different in the 2001-2004 V70s.

Thanks!

pronouncedeyen · Post by **pronouncedeyen** » 04 Oct 2021, 05:53

I searched online for writing diagrams and found the relevant page for fog lights. I see fuses for the front fog lights in the CEM (fuses 17&18) but nothing for a front fog light relay. Is it possible they put this functionality into the CEM board itself in the 2005 and newer models? Anyone know for sure?

darylrobert · Post by **darylrobert** » 04 Oct 2021, 06:04

you cant just plug in lights and expect them to work, they need programming. If you want to avoid that the only option is to wire up a relay and switch or you could try a "high jack" the factory switch. The factory switches are momentary so you will need a latching relay

darylrobert · Post by **darylrobert** » 04 Oct 2021, 06:17

alot of people with the newer vehicles have problems with the high beam lights, volvo made the relays integrated into the main pc board so simply plugging in a new relay is not possible. I would guess the fog light relays have also gone into the main board

https://www.swedespeed.com/threads/cem- ... my.220700/