(20-01-17, 04:15 PM)BBROWN1664 link Wrote: :agree
the bulb could be failing and shorting internally as you go over bumps causing the high beam filament to illuminate.
The H4 bulb is only a few months old, I changed it late summer, so I would hope it wasn't that, i'll bear it in mind though.
I don't think the lower filament was going off, but to be honest it's difficult to tell with the spotlights on at the same time.
I did buy a pair of bulbs so I do have one to hand if the switch doesn't work though.
I'm still clinging on to the fact that as the high beam display light stayed on for a while after spraying the switch housings I'm hoping that it's the left switch that's iffy.
I just spoke to my electronics engineer at work and he thinks the left side as well, as that is what controls the low/high beam, whereas the right switch unit turns it all off without any problems.
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