WayTooUnCool
Member
- Posts
- 11
- Location
- London
Hopefully this doesn't fall into the category of 'stupid question' or, if it does, it at least results in some much needed merriment!
I have a 1998 Defender 2.8i which didn't come with a low fuel warning light. As part of a lockdown project I am trying to remedy that by using some of the functionality provided by my tracking device, which has some pretty clever telematics capabilities (https://wiki.teltonika-gps.com/view/FMB204). It permits direct measurement of a voltage on one of the input wires and the digital outputs can be triggered based on the received voltage level, which I would wire to one of the unused warning lights on the instrument panel (eg the 24v one)....that's the theory anyway.
Trouble is, as the seasoned reader will be thinking, 'what he's missing is that the fuel sender outputs a resistance, not a voltage'. My question is, is the voltage that I measure between the 12v (White/Green wire) and the sender input (Green/Black, sends resistance) to the gauge the variable voltage that I need? If so, is it ok for me to connect the FMB204 analog input wire between the two terminals at the back of the gauge? If it is then I can use the software provided with the FMB204 to calibrate the fuel levels to the voltage and happy days, but I am concerned that I might be missing something which could result a nasty smell and smoke billowing out of the dashboard....or worse!
The wiring differs slightly from the TD5, which had a low fuel warning, but the wiring at the back of the gauge is identical, I think.
Call me old-fashioned but I would prefer not to blow up my vehicle and probably half the property along with it, so advice and guidance would be greatly appreciated!
I have a 1998 Defender 2.8i which didn't come with a low fuel warning light. As part of a lockdown project I am trying to remedy that by using some of the functionality provided by my tracking device, which has some pretty clever telematics capabilities (https://wiki.teltonika-gps.com/view/FMB204). It permits direct measurement of a voltage on one of the input wires and the digital outputs can be triggered based on the received voltage level, which I would wire to one of the unused warning lights on the instrument panel (eg the 24v one)....that's the theory anyway.
Trouble is, as the seasoned reader will be thinking, 'what he's missing is that the fuel sender outputs a resistance, not a voltage'. My question is, is the voltage that I measure between the 12v (White/Green wire) and the sender input (Green/Black, sends resistance) to the gauge the variable voltage that I need? If so, is it ok for me to connect the FMB204 analog input wire between the two terminals at the back of the gauge? If it is then I can use the software provided with the FMB204 to calibrate the fuel levels to the voltage and happy days, but I am concerned that I might be missing something which could result a nasty smell and smoke billowing out of the dashboard....or worse!
The wiring differs slightly from the TD5, which had a low fuel warning, but the wiring at the back of the gauge is identical, I think.
Call me old-fashioned but I would prefer not to blow up my vehicle and probably half the property along with it, so advice and guidance would be greatly appreciated!
