| Author | Message | ||
     Alxsrq |
Hello all, First off my bike is a 07' Firebolt. I'm trying to wire my low fuel light to a small led strip. I have the manual, and see Y/R wire comes from fuel pump to gauge cluster. Question is; the light strip has +12 and -12 leads, should Y/R be on + lead, or should I be using a ignition switched on +12? Or should Y/R be on the -12 lead and switched ignition on + lead? Right now I have Y/R on + and - goes to bike ground... any help understanding this would be appreciated, I don't want to run out of fuel! | ||
| Tazmania720 |
if you have a fuel strip, then it is probably needing a sending unit to drive the indicators properly. I have an X1 and only have one light, and when the sensor says low, that's all I get. I would imagine you would have to install some sort of float to make the strip work like you want. Hope this helps a bit. Ed | ||
| Alxsrq |
Thanks Taz, but it's not really that complicated. I'm using the existing signal from my fuel pump. I was just wondering if that signal senses +12 or -12. on Y/R wire? | ||
| Alxsrq |
Just a quick update, if any1 has an idea how I can make this work. The Y/R wire is -signal, the resistance changes depending on how much fuel is in the tank. So can changes in resistance switch or trigger a circuit? + 12 on one side of my LED and then this wire at a certain resistance maybe adjustable...does any1 know what I could put in series to -12 LED? | ||
| H2owerker |
Do you know if the resistance goes up or down when fuel gets low? | ||
| Id073897 |
Do you know if the resistance goes up or down when fuel gets low? Neither of it. The resitance changes according to sensor temperature, so first it has to be heated up. Once heated, resistance DEcreases (NTC), so to limit the current and to not heat the sensore up further more when no more cooled by the fuel, a second resistor is needed feeding the sensor. As a constant resistor will limit the current to a limit not heating up the sensor at all, a resistor whith INcreasing resistance (vs. heat) is needed (PTC). A bulb is a typical PTC, whereas a LED is not. (Message edited by id073897 on January 08, 2009) | ||
| H2owerker |
 So the low fuel indicator lamp is an integral part of the circuit? If it were removed, could the LED strip with a resistor in series be used in it's place? | ||
| Id073897 |
So the low fuel indicator lamp is an integral part of the circuit? If it's a real lamp, yes. A LED in series with a resistor won't work as the current is to low to heat the sensor. Might work with the LED in parallel to the resistor (220 Ohms, 3 Watts), but it might glow always and then light brighter with an empty tank. NTC are cheap, so try it first with a glass of water. |
