Headlight dulled - corrosion?

[matty137]

One of my headlights has dulled, it has happened before so I replaced it which didn't fix it so I fitted new sidelights (I think thats what theyre called) and that fixed it for about 1 or 2 days. it has now gone back to having the headlight dulled but not the sidelight. could it be corrosion or a loose connection and if so would it be on the sidelight or the headlight terminals.

[Octane2097]

just sounds like dodgy connection,
take your bulbs out make sure no rust on the terminals,
also the hedlamp bulbs are dual element so check make sure one hasnt blown

[scotty cav turbo]

IIRC there is a small earth wire thats in the headlight itself, also check that aint corroded or broken.