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Date: Thu, 3 Feb 2005 10:23:28 -0500
From: "The Malt Hound" <rabbitsfriendsandrelationsnospamail.com> wrote in message 
news:420171A4.48EF9DF1nospamail.com...
> Hi all,
>
> I have had various headlight problems since purchase of my 'lemon' 
> 9000
> CSE 2.0 LPT.
>
> I fixed most of them by replacing / fixing the 'headlamp control 
> unit'
> that detects bust filaments.
>
> For your info - said unit ( the orange one ) packs up due to 
> vibration
> causing solder joints to fail. Wish I'd known that earlier ! Anyway 
> I
> found a replacement ( also turned out to be defective long term but 
> I
> was on the case by then and fixed both the original and replacement 
> with
> a soldering iron ! ).
>
> Since then it's been better but occasionally one headlamp won't
> illuminate on dip beam ( normally the offside one - UK - but very
> occassionally the nearside one ). Full beam never seems to be a 
> problem.
> When the bulb doesn't illuminate, the dash displays a fault so the
> 'control unit' is doing its job.
>
> A 'thump' to the headlamp glass normally fixes it - as does driving 
> some
> distance - you normally hit a bump that encourages the unilluminated
> bulb to spring to life.
>
> Is there a known weak spot that accounts for this ? I'm really 
> puzzled.

Are you sure the bulb is not blown?  Sometimes the broken filamnet 
will remain attached to the poles and swing around in the bulb 
envelope until the two ends touch together, temporarily welding 
itself, only to beak apart at the next cooling cycle.

-Fred W 

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