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I have a1998 ford mondeo diesel the headlights have suddenly become very dim , both dip and mainbeam any ideas

Supplement from 01/18/2009 06:06pm:
And the winner is WUMPUS dadaaaaaaaaaaa
more of an albert einstein than my missus the angle was too low you saved me having to crawl under the car and check the earth strap so i watched the snooker instead with spurs on the radio thanks to you all who says that community doesnt exist in this modern world is misguided

asked in cars

wumpus answers:

First off, do the obvious. Clean the glass!

Supplement from 01/18/2009 10:43am:

Next up, are you sure they're actually dimmer, and not just angled downwards?

My Mondeo has a control for this; it's a thumbwheel bearing the numbers 1..6 located on the fascia to the right of the steering column. Try adjusting it, but don't leave the headlights set too high.

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athenabs13ohe answers:

Could be the battery, dropping out on you. ie. not charging up.
Take it to a garage and get a drop out test done on battery, see if the battery is holding/not holding its charge. If battery is ok. Maybe the garage can help on why. (mot garages do drop out tests on batteries free.)

Supplement from 01/18/2009 10:17am:

Another thought that crossed my mind, it could be the alternator. Take it to a garage.

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Messerwisser answers:

Check the reflectors. They may have corroded.
Even electric contacts can corrode.

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mercman99 answers:

As the above answers but check the earth strap to the engine.This should be on the gearbox.Also make sure your connections are clean and the earth connectors on the light cicuit are too.

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PARRY22 answers:

I have read in a DIY manual that if a battery is over 4 years old and it appears not to be giving out sufficient power it is worthwhile replacing it anyway as its ability to hold a charge will decrease from then on even if you try to recharge it with a battery charger.

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diesel999 answers:

could be a bad earth

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