Originally Posted by Foundrydude
Get a transistorized flasher instead of a silver can thermal flasher. Thermal flashers are resistance based, transistor flashers have a little circuit board.
One working, one not tells you there's a difference in resistance side to side. May be a bulb not working or may be mismatched bulb numbers. Like a 1056 and and a 2056 look the same but the 2056 is a higher wattage bulb. Same will 1157 and 2057.
Dude, how do you tell one from the other.
On the bulbs, I was told in a Harley Davidson forum, some time ago, that the 20 series bulbs were just a heavy duty bulb able to withstand vibrations better.(mainly used by tractor/trailer rigs), These are the only ones I use. I don't feel there any brighter.
Looks like a Google search is in order.
Thanks about the flashers, Bill
On edit, after a quick search, (5 links on the first page) I feel I'm correct. In fact some said the 20 series bulbs they thought were a little dimmer. Looking at a bulb wattage/lumens chart, they look to be the same. A heavier filiment and thicker glass was also noted.