Jump to content
Do Not Sell My Personal Information

Mk3 focus st dipped beam bulb fault


Recommended Posts

Hi my driver side dipped beam bulb blew the other day so i changed the bulb, i checked the bulb everything worked fine until i started my car then this caused it to blow again so i replaced that bulb checked it and it was fine until i started the car which made it blow again, both have now blown when i started the car. I have tried changing the bulbs with different makers just incase it was due to the bulb. Any ideas?

Link to comment
Share on other sites

if you've got HIDs then probably the ballast.

if you've got standard halogen bulbs then possibly damaged lampholder or a short between live & the chassis on the wiring harness to the headllight.

we can rule out overvoltage spikes from the alternator as this would blow both headlamps.

my moneys on the lampholder.

Link to comment
Share on other sites

  • 2 years later...

This problem usually happens because of the faulty ballast or bulbs. In my case I replaced bulbs which I got from an online store, I would suggest you try these ones or if you had tried something like this before, so replacing ballast would be a better option.
Here’s the link of bulbs: https://xenons4u.co.uk/h7-55w-super-white-xenon-effect-headlight-bulbs.html

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...