• Join Premium & Save
      Join Premium & Save
    • Get Your Club gear
      Get Your Club gear
    • Savings Up to 15% Off For Members
      Savings Up to 15% Off For Members
    • 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


Ford Focus 1.6 Headlights Dim When Bass Hits

Recommended Posts

Hi All. Im new to the forum. not sure if anyone can help me.

I have a 55 plate 1.6 ford focus.

now everytime I turn my radio up and the bass hits the lights dim (headlights, odometer light)

now this is what I have installed at present

105a brand new ford original alternator

a brand new 72ah battery silver calcium ford original

done the big 3 wire upgrade

cleaned up the grounds in boot, headlight earth, and main earths

I have a jvc head unit

A FLI 900S 4 channel amp in 2 channel mode bridged with a 12" edge sub connected to it

if anyone could shed any light on the situation.

would be gratefully appreciated.

Share this post

Link to post
Share on other sites


This is a classic Audio problem.

The current draw is higher when the Bass audio is kicking in. There is a easy thing to sort.

I would suggest a Power CAP on the power input to the Amplifier. There are tables that will say what value is required.

But I would suggest a 1Farad cap should do the trick.

These are not that expensive, but go for a good make Cap as the cheaper ones are a little pony and not true to the value.

If I can suggest a retailer, I have worked close with Gavin at G7 Sounds. These guys know the products and trade.

You can say you spoke to JustConnect and they may do you a good turn.



Share this post

Link to post
Share on other sites

Hi (just connect)

I have been told that installing a cap will only make things worse. Im going to see my local audio speaialist at weekend to see what they have to say. But thanks anyway. :D

Sent from my GT-I9300 using Ford OC mobile app

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