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Discussion Starter #1
Was going to take the new to me bike in for state inspection tomorrow and just going over her one more time and noticed my tag looking a little dull. I pulled the light bulb out of the license plate housing an it was blown. I looked around the shop and had nothing that would fit. Ok, too late for the car parts stores, but maybe, just maybe Wal-Mart will save me. NOPE!! they had some festoon bulbs but not the size I needed. Went home checked the book and the designation is 12 V 5 W, DIN 72 601, Standard Designation C 11, Which means absolutely nothing to the little digital light bulb finder on the shelf by all the pretty light bulbs they had except the one I needed.
What I am wondering is how many millimeters is the light bulb and can one of the LED festoons off of Ebay work? LEDs with the vibration resistance, low draw and long life might mean I would likely never need to replace it again. EBay has various sizes but nothing with any of the book designations and the info on the bulb pulls up too many sizes in millimeters that I don't want to take a stab in the dark and end up with one too short or too long.
Thanks
 

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Discussion Starter #2
Disregard.......I found one.

After another search through the old tool box I found an LED festoon bulb that fit and does work. Only problem with it, is it is blue. Think it was in a used car dome light that I had, that I took out. I never through stuff like that away even if it looks like I would never use it. It looks pretty cool though. Don't think I'll pass inspection with it, so I will wait until I get either a white LED or regular bulb.
 

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These tail bulbs and holders are a pain and just as bad on car license plates. The problem is all the water and muck gets around there and there's enough vibration to knock out the fine filaments on the small torpedo lamps they use.

There are some that might like riding with their license plate bulb blown and that I can understand.

Anyway, just before my test I had your problem. I had a box full of white leds and on a thin strip of Veroboard managed to 'emulate' the torpedo bulb as 3 white leds, an hours work, fit and forget, never to be fixed again.

Afterwards I saw sellers on Ebay selling the torpedo lamps as a led replacement which being commercial would be a lot neater than my fix. I'm planning to get some for the bike and car.

Often the spring contacts get really dirty so they stop working or flash and draw attention. I'll probably solder in the led replacement.



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Discussion Starter #4
These tail bulbs and holders are a pain and just as bad on car license plates. The problem is all the water and muck gets around there and there's enough vibration to knock out the fine filaments on the small torpedo lamps they use.

There are some that might like riding with their license plate bulb blown and that I can understand.

Anyway, just before my test I had your problem. I had a box full of white leds and on a thin strip of Veroboard managed to 'emulate' the torpedo bulb as 3 white leds, an hours work, fit and forget, never to be fixed again.

Afterwards I saw sellers on Ebay selling the torpedo lamps as a led replacement which being commercial would be a lot neater than my fix. I'm planning to get some for the bike and car.

Often the spring contacts get really dirty so they stop working or flash and draw attention.
voxmagna said:
I'll probably solder in the led replacement.
I like your thinking. I was looking at it last night and thinking the same thing....If I were to solder an LED in here it would be fixed for life basically.

As a follow up I got the bike inspected today with little to no problems, the guy was thinking I was missing a shock absorber in the back though. I think it was the first BMW he ever saw. He even asked when we were filling the paperwork out what's the name of that thang again? He never even looked at my plate light. He had a hard enough time looking at rear brake pads after I took the cover off.
 
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