• Huge Range of Ford Parts
      Huge Range of Ford Parts
    • Share Your Car Experience
      Share Your Car Experience
    • 1000's Of Fords For Sale
      1000's Of Fords For Sale
    • Join Premium & Save
      Join Premium & Save
    • Savings Up to 15% Off For Members
      Savings Up to 15% Off For Members
    • Get Your Club gear
      Get Your Club gear


PaulR93

Windows Causing Headlights To Dim

Recommended Posts

A strange one here when I put the side windows up my headlights dim then go back to normal once I let go off the up switch.

Is this normal?

Share this post


Link to post
Share on other sites
 

Na not really normal. What happens when u use more power? Ie open windows and put the heated screen plus ac on at the same time.

It could be your alternator isn't charging the battery enough. So if the battery isn't getting 14volts when it needs it, it will struggle to power things.

Share this post


Link to post
Share on other sites

Check charging rate an what output is in amps for ur alternator an what size is ur battery is but it does happen if just sitting idling ur puttin an extra load on it if battery good an it's charging I wouldn be worried some people buy higher output alternators an bigger battery this can help

Share this post


Link to post
Share on other sites

My wife's Clio does the same. You can hear the relay switch in which is taking power directly from the battery which makes the lights dim slightly and then you can hear the relay switch off when the window has reached and the lights brighten again. There is no issue with the battery or alternator.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now