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hi everyone the left side off my headlight comes on when switched on then goes off and then comes on approx every 5secs then off i,ve changed bulb no good any idea sounds like relay problem thanks
 

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2000 108CDI, 2007 120 CDI long, Suzuki K5 GSXR track bike, 2005 Kawasaki ZX10R
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Hi ya, it could be an earth problem or a problem with the wiring plug, does the indicator work ok on that side and does that make the headlght /side light flash even slightly??

Cheers Martin
 

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Vito 111CDi 2004
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Unfortuantely there's no relay for the headlights - it's all transistor controlled via the Signal Aquisition Module (or SAM) which lives on the RHS in the box under the bonnet.

I suggest you trace the wiring all the way to the SAM, if it's still going wrong then you might have to get the Star diagnosis on it or alternatively do some rewiring (via an automotive relay) from your other (good) headlight.
 

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W204 C320CDI 2009 and W639 Vito 115CDI 2006
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hi everyone the left side off my headlight comes on when switched on then goes off and then comes on approx every 5secs then off i,ve changed bulb no good any idea sounds like relay problem thanks
I know from experience it will do that if it's drawing too much current. For example if you install a 100W bulb in place of the standard 55W it will cycle on and off about every 5 secs. So there's some kind of circuit breaker arrangement.

I'd take a guess the current draw is too high for some reason. I'm assuming you have the standard 55W bulbs.

Check the earthing points. There are a bunch of brown wires bolted to the body below the headlights. The headlights are earthed at those points.
 
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