No, but shorts do happen.

 

What happens if the light bulb is shorted?

3 watt glow plug?

This is a reasonable good paper on:
How to select an NTC Thermistor
The material includes the self heating effect which is what a low fuel indicator depends upon to do what it does. My bike has an actual fuel level gauge so I never have given a low fuel light any thought for a few decades. While other than crummy Christmas tree lights I have never seem an incandescent light bulb short I would assume the remote possibility is figured into the scheme.

Ron

 

I was NOT referring to a bulb failure.

 

I was NOT referring to a bulb failure.

So you were referring to the wires to the lamp shorting?

What happens if the light bulb is shorted?

My guess is they considered what could go wrong at design time. Low fuel indicators have been made this way for decades that I can recall. There is also no shortage of fuses on most bikes.

Ron

 

Fuse...good answer.

 

Fuse...good answer.

Years ago a few fuses covered a car or truck. I really have no clue how many fuses are in my truck and then to complicate things even more they are in three separate locations and maybe a few I have yet to find.

My bike like me is retro being a 92 Harley Electra Glide road bike. The wiring harnesses are as bad as my truck. Really, I mean that, right down to the ECM computer as well as a module for the turn signals. At least the fuse block is only one in one location and no shortage of fuses. I guess a fuse beats replacing a fried harness.

Ron

 

I guess a fuse beats replacing a fried harness.

Or a fried bike.

 

Hi and thanks for all the replies. I have scoured Google to try to find any info on motorcycle fuel tank temperatures. I would have thought that fuel stored in a non insulated metal tank above a 1000cc winging would get quite hot indeed! Looking at the 68Ω thermistor it would only need a 5° temp rise to drop below the 56Ω light trigger.
I have ordered a 68Ω / 100Ω and 150Ω thermistor to do some tests.
The 150Ω looks like it will trigger the light between 45 and 50° which may give me a better tolerance with hot fuel.
Ceefna

Hi, wondering how your low fuel light tests turned out ceefna.
I had read 1k ntc on the web but thinking that maybe incorrect and 100ohm ntc is more like it from my little tests with a 194 bulb and a adjustable power supply. Wondering how it all turned out for you?