day running lites/headlight issues

curbstone mech · Post by **curbstone mech** » 25 May 2010, 08:26

Neither my day running lites or hi/low beams work. The fuses are okay and so are the bulbs.
Some oen sais check my relays, but why would both relays be bad? Any one know of a fix for this? Foglites and aprking lites are fine

Moondust70 · Post by **Moondust70** » 25 May 2010, 09:28

Its probably the headlight switch that is faulty ............... it is actually a switch and combined control module but does not require software to enable when its replaced as it is a CAN-Bus slave module. They have been known to fail but it is quite unusual.

billr99 · Post by **billr99** » 26 May 2010, 17:34

Did you check ALL the fuses? There are a total of four (low and high for each side) in the underhood box and there is a fuse each for high and low that powers those circuits in the box in the passenger compartment. In addition to all of those fuses, there is also a fuse that powers the light switch module in the dash box. There is also a possibility of a shunt blowing out, too.

Good luck,

Bill

Post by **matthew1** » 27 May 2010, 00:23

Did you get a "daytime running light failure" message? Funny thing is I'm looking at buying a 2004 V70 R, and this message popped up while I was driving it today, and the headlights -- both hi and low -- and daytime running lights would not illuminate. It has Xenons if that matters. Fuses 10 and 11 checked out ok.

curbstone mech · Post by **curbstone mech** » 03 Jun 2010, 10:24

Thanks for all the responses. I'll try them all.
Where are the fuses in the passenger compartment? I found what looks like relays under the dash, below the steering column.
I don't know where else to look.
Thanks!

Post by **matthew1** » 03 Jun 2010, 16:08

My problem was simply fuse #1. The owner, who I was buying the car from, thought it would be only #10 or #11.

Open the driver's door and look at the hinge, then look to the right. That's the fuse box.

curbstone mech · Post by **curbstone mech** » 04 Jun 2010, 11:54

Perfect!
That did it, thanks a million.
Have a good weekend, everybody