Why are back up bulbs dual filament?
#1
Why are back up bulbs dual filament?
Doing some work on rear lighting and curious why the back up bulbs have 2 filaments? I thought they were either on or off. Or do they just both come on for a brighter light ...which makes me wonder why they just didn't use a larger single filament.
Please forgive any stupidity here, it is not intended :-).
Jay
Please forgive any stupidity here, it is not intended :-).
Jay
#2
Think I would more suspect someone put the wrong bulbs in there..... Check the socket, see how many contacts there are at the bottom. (should only be one.) It's entirely possible that this was someones Idea of how to get more light while backing up, for minimal cost. (and it likely worked. )
#3
Think I would more suspect someone put the wrong bulbs in there..... Check the socket, see how many contacts there are at the bottom. (should only be one.) It's entirely possible that this was someones Idea of how to get more light while backing up, for minimal cost. (and it likely worked. )
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#8
The back up light socket is flat as well. When I search for an 1156 bulb, it shows me a round (old style) bulb --- so that wont fit. Is there an 1156 Flat bulb?
#9
I'll admit I'm somewhat stumped on this one. Rockauto and Napa only show 1156 for the backup, OReilly's also lists 3157 which is a dual filament flat style. I have no idea why the backup would use a dual filament but I'd guess only one of them is used.