My headlight wipers don't work. I can hear what sounds like a motor running on both sides but no movement. Is there some easy fix I can try... or something common to check?

Thanks

On my 40-minute winter commute, I can't tell you what a relief it is not to have to pull over at least once on snowy days to clean off my headlights. Even when my car has been splattered by salt and winter road slime, my headlights are clean. The wipers move snow and slush with ease. (A friend who owns a BMW complains how useless his hi-pressure sprayer is.) Are they perfect? No. Are they better than nothing? Absolutely. Way better. Personally, I'll never buy another car without a headlight clearing mechanism. Now if I could just get a rear wiper on my S70....
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(98 S70 T5SE misc mods, mostly lighting) (92 940GLE)

There is a t-value that very often fails. If you raise hood, wiggle and pull on pass. side tubing and follow it as best you can, valve is in front of radiator, behind bumper maye 12 inches from light. T valves are sticked by dealers or places like IPDUSA.COM as have them. Very easy to replace.

Personally I don't think wipers clean very well as far as bugs & mud. Although like you, I feel if it there, it really should be working. Where I do love headlight wipers is driving through snow. One flick of switch and visibility returns!