1966 Canadian built valiant custom 200 convertible

Nothing at all when rotating it. I just pulled the dash to check all bulbs, they are all fine. So maybe it is the switch. Headlights are so dim too. There was a fancy new radio put in so I disconnected that figuring it may have been drawing too much?
Crackedback here on the site makes and sells really nice headlight relay kits to brighten up your lights. It really helps the dash lites as well.