speedo bulb

Electrical issues
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george48pan
Posts: 86
Joined: Mon Nov 09, 2009 12:55 pm
Bikes: 48 panhead
Location: chicago

speedo bulb

#1

Post by george48pan » Tue Jun 05, 2012 10:13 pm

My pan is a 12V system with a cycletron generator/regulator. I have a #57 bulb in the speedo. I rode approx 630 hwy miles two days ago. The bulb was new when I started. I wasn't riding at night so I don't know when it didn't work. Are there any ideas out there to get longer bulb life?



Hog54
Posts: 821
Joined: Tue Aug 31, 2010 2:10 pm
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1980 Lowrider

Re: speedo bulb

#2

Post by Hog54 » Tue Jun 05, 2012 10:40 pm

Use truck bulbs.

t-jacobs
Posts: 23
Joined: Sat Aug 13, 2011 2:53 pm
Bikes: 64 FLH

Re: speedo bulb

#3

Post by t-jacobs » Tue Jun 05, 2012 11:39 pm

where do you get truck bulbs ?

FlatHeadSix
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Bikes: '31 VL, '34 VD, '45 WLA, '47 WL, '49 FL, '51 WL, '58 ST (Hummer), '71 GE (Servi)
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Re: speedo bulb

#4

Post by FlatHeadSix » Wed Jun 06, 2012 12:57 am

George,
A GE 25591 (No 57) is a 14 volt 3 watt bulb, it should last forever in a good 12 volt system. It might be possible that your regulator is not keeping the voltage where it belongs, 14 volt output is OK in a 12 volt charging system, until the battery reaches full charge, then the regulator should kick in and throttle it back a bit. What are the rest of the lights doing? Are you having early failure in the tail light bulb as well? How many of those No 57's have you burned up?

mike
http://www.elightbulbs.com/catalog_prod ... od=GL25591

george48pan
Posts: 86
Joined: Mon Nov 09, 2009 12:55 pm
Bikes: 48 panhead
Location: chicago

Re: speedo bulb

#5

Post by george48pan » Wed Jun 06, 2012 2:45 am

I have no problem with tail light or head light and spots. I only have one dash light... for the speedo.
I have to try and figure out how to post a picture.

the bulb is not burnt. The filament is broken.

george48pan
Posts: 86
Joined: Mon Nov 09, 2009 12:55 pm
Bikes: 48 panhead
Location: chicago

Re: speedo bulb

#6

Post by george48pan » Wed Jun 06, 2012 3:08 am

The spots operate only when I am running and NEED them. The kill switch on the right hand grip operates a relay for the spots. The head light is a newer style. I hope the pictures load.

george48pan
Posts: 86
Joined: Mon Nov 09, 2009 12:55 pm
Bikes: 48 panhead
Location: chicago

Re: speedo bulb

#7

Post by george48pan » Wed Jun 06, 2012 3:26 am

speedo2.jpg
bike (5)2.jpg
bike (4)2.jpg
bike (3)2.jpg
bike (2)2.jpg
bike1.jpg
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