How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Chris (aka-Moose) Your Own Question
Chris (aka-Moose)
Chris (aka-Moose), Technician
Category: Volvo
Satisfied Customers: 48366
Experience:  16 years of experience
Type Your Volvo Question Here...
Chris (aka-Moose) is online now
A new question is answered every 9 seconds

All my low beam head lights wont work, all other lights are

Customer Question

All my low beam head lights wont work , all other lights are ok
JA: Have you checked the fuses? Have you checked the bulbs?
Customer: All fuses are good
JA: What is the model/year of your Volvo?
Customer: 2004 s40
JA: Are you fixing your S40 yourself? What have you tried so far?
Customer: Check all the fuses, bulfs
JA: Anything else you want the mechanic to know before I connect you?
Customer: The last time i tried to turn the high beam on , the it happened
Submitted: 1 year ago.
Category: Volvo
Expert:  Chris (aka-Moose) replied 1 year ago.

Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.working after noon till just after midnight.

  • Sorry no one has helped yet.
  • Yes, you have been charged already.
  • Yes, I am aware of the time you asked your question and time I am responding.
  • I will be online a couple more hours after this post.
  • This is not an answer to your question, just an inquiry if your still needing/wanting help. Because I believe I can help.
Customer: replied 1 year ago.
I do need help
Customer: replied 1 year ago.
what is the answer?
Customer: replied 1 year ago.
Answer please
Customer: replied 1 year ago.
Im charged already
Customer: replied 1 year ago.
No answer
Customer: replied 1 year ago.
Whats all this? Instead of an answer?
Customer: replied 1 year ago.
Hello! Anybody there?
Expert:  Chris (aka-Moose) replied 1 year ago.

Welcome, sorry you did not notice the hours I said I work.

Does your vehicle have HID XENON headlights?

Are the fog lights on with the low beams commanded on?

Do you have a sophisticated scan tool?

Customer: replied 1 year ago.
No i dont have any tool and the fog lights are working normal
Customer: replied 1 year ago.
Just regular head light with bulbs
Expert:  Chris (aka-Moose) replied 1 year ago.

Thanks, ***** ***** to check the bulbs but it would be really odd for both to fail at the same time. You already mentioned you checked the fuses. Since the fog lights work, that means the CEM Central electronics module is getting a signal from the headlight dimmer switch. The CEM powers the headlights, so this failure is going to be a faulty CEM that needs to be replaced. It is behind the right side of the dash.

This is my 1st answer, but does not have to be my only answer. You the website and myself expect you to have a ~~~5 STAR EXCELLENT~~~ experience with my help. Please let me know if you are pleased by selecting a star rating above or by replying and saying your pleased. Not rating or rating 1-2 stars does not benefit you nor me in any way. Follow up and reply as often and when needed, there is no extra charge to do so.

Thanks Moose.

Customer: replied 1 year ago.
where do i get that CEM ? About how much ?
Expert:  Chris (aka-Moose) replied 1 year ago.

To my knowledge, they are not sold aftermarket. The dealership would be the best place to get one. I noticed a misprint in my prior post, left side of the dash, not right side. Part cost guesstimate 700$.

Customer: replied 1 year ago.
I looked under the dash and saw 3 squares relays which one is for the low beams?
Expert:  Chris (aka-Moose) replied 1 year ago.

There is not a low beam relay. Would you like to see the wire diagram so you can see what is used for the low beams?

Customer: replied 1 year ago.
please send me the diagram .
Customer: replied 1 year ago.
please sendme the diagram
Expert:  Chris (aka-Moose) replied 1 year ago.

Hello again Chris here,

  • I am following up with you to see if you got everything you needed from my answer.
  • I have not heard back from you, so I assume you were not pleased. We're you pleased with my help?
  • If you were not pleased with my help, please let me know by replying so I can help more.
  • This post is coming up on the 7 day mark where it times out. When a post times out, that means it's no longer on my active list (you reply and I may never know it.)

Thanks Chris

Customer: replied 1 year ago.
Could it be the head light switch? $ 700 ? I will junk the car.
Expert:  Chris (aka-Moose) replied 1 year ago.

No this should not be the headlight switch to blame.