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Car trouble: Keyless and lockless is no match for brainless

Doctor Syntax Silver badge

"It does have the big advantage that it's mechanically impossible to have the fog lights on without the headlights"

AIUI the theory about fog lights is that by mounting them low you don't end up looking down the beam to the same extent that you do with headlights and that the backscatter doesn't, therefore, dazzle in the same way as headlight backscatter does. Not that I've ever found that convincing in practice.

But it does imply that the correct operation is to have headlights off when you need fog lights.

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