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Dan, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 1694
Experience:  Auto Technician
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2003 s430 low beams went out. One failed, and a week later

Customer Question

2003 s430 low beams went out. One failed, and a week later the other failed. Replaced both bulbs, and still not working
JA: Are you fixing your S430 yourself? What have you tried so far?
Customer: yes thought is just the bulbs I se online about a Signal Acquisition Module possible being the problem
JA: Anything else you want the mechanic to know before I connect you?
Customer: Don't think so.
Submitted: 10 months ago.
Category: Mercedes
Expert:  Dan replied 10 months ago.

Hello my name is***** am an ASE Master Technician and I am glad to help you with your question.

Expert:  Dan replied 10 months ago.

You will need a volt meter and a wiring diagram to diagnose, I would check all the fuses for the headlight bulbs first. It could also be a module problem. I can send you a wiring diagram if you need one.

Customer: replied 10 months ago.
A wiring diagram would be great. I believe headlights are in both right and left fusebox
Expert:  Dan replied 10 months ago.

If you had the dealer or similar scan tool you could go into the SAM modules as they both have CAN communication lines going to them. You also should check power and grounds at these modules.

Expert:  Dan replied 9 months ago.

Hello again Dan here,

I am contacting you because the post has not been closed or rated.

This question is coming up on 7 days which means it will time out and close.

You have already paid to get this question answered, but you have not rated.

Let me help some more. Is there anything else I can help you with?

If I did not give you 5 star service, please let me know what I missed.