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FJR Motorcycle Forums
Technical & Mechanical Problems
Changing Speedometer Instrument Dash Lights on a Gen 1
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<blockquote data-quote="Grumpy" data-source="post: 378519" data-attributes="member: 105"><p>Iggy, the dark lamps are due to deposited tungsten from the filaments. This is indicitive of lamps that have been in operation for a while. If you look at one of the lamps from your house that have burned out, you'll find that one end or the other will be black depending on burning position. If these were halogens, they would be clear. However, given where these lamps are located, I personally would have changed them all out at the same time. If you take a look at the failure rate for a batch of filament lamps, you'll find that they all "blow" at pretty close to the same time. This might explain why when you change one headlight, the other one fails shortly thereafter.</p><p></p><p>Again, thanks for the pictures and the write-up!!!</p><p></p><p>jim</p></blockquote><p></p>
[QUOTE="Grumpy, post: 378519, member: 105"] Iggy, the dark lamps are due to deposited tungsten from the filaments. This is indicitive of lamps that have been in operation for a while. If you look at one of the lamps from your house that have burned out, you'll find that one end or the other will be black depending on burning position. If these were halogens, they would be clear. However, given where these lamps are located, I personally would have changed them all out at the same time. If you take a look at the failure rate for a batch of filament lamps, you'll find that they all "blow" at pretty close to the same time. This might explain why when you change one headlight, the other one fails shortly thereafter. Again, thanks for the pictures and the write-up!!! jim [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Changing Speedometer Instrument Dash Lights on a Gen 1
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