I have a 1966 Beaumont sport deluxe convertible. The backup lights have never worked and Im trying to fix them. My first problem is the lightbulbs. They say W631 on them and i cant find them for sale or even any equivalent. Who is to say these are actually the right bulbs anyways. Does anybody know what kind of bulbs the reverse lights take? Any idea what the issue would be if I use the wrong bulbs?
The parts computer at Canadian Tire indicated 1156 as well. That's a single filament bulb and these W631a that I have are dual filaments. I suspect these W631s are probably the wrong bulb that was put in at some point.
Thanks to you both for confirming that. No offense to the 16 year old at Canadian Tire, but I wanted a more informed opinion.