Headlight not working

BLESSING EWOBOR

MEMBER
2014 MERCEDES BENZ GLA250
AUTOMATIC
134,567 MILES

Hi, this vehicle head light (right side) is not function but the left side is functioning. Both sides supposed to light up at the same time. What could be the cause?
Could I get circuit diagram for this?

Thursday, August 12th, 2021 AT 12:34 AM

3 Replies

SQM

MECHANIC
6,383 POSTS

Hello,

Just so that we cover all the possibilities, have you checked to see if the right side headlight is actually good and not burnt out?
Also does this vehicle have LED/HID headlights or the standard halogen?

There are several modules that can impact the light. It will all depend on the type of headlight that you have on that GLA. You could have a faulty power supply module, igniter module or control module. First check to see if you are getting power to all the components (see diagram below). That way you can narrow down the search.

https://www.2carpros.com/articles/how-to-check-wiring

See attached for the headlight wiring diagrams.
Let me know of any questions.

Thank you.

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