Maker Pro
Maker Pro

Need help on digital speedometer fuel meter

Ralf Kalkuhl

Dec 13, 2016
7
Joined
Dec 13, 2016
Messages
7
The problem is that the meter always shows full even when empty i don't know which wire on the gauge is the fuel wire or if its integrated on any of the other wires, the float and sending unit is okay so i think it's either the gauge or the wiring, I converted it from analog to digital, the analog one had 3 wires which i think are 12v, ground and the sender wire from the float. I will include the manual from the digital gauge and the wiring on the bike harness
107j4op.png
154d260.jpg
 

73's de Edd

Aug 21, 2015
3,613
Joined
Aug 21, 2015
Messages
3,613
Sir Ralf . . . . .

If your sender is being a variable resistant unit , it thereby seems like it is dependent upon the value of changing resistance being applied between the very two top pins of the connector which you have shown.
Try connecting a 100 ohm resistor between those two connections and see if the display then indicates a decrease in fuel level.
If so, then a 47 ohm resistor should show an even lower level of fuel on the display.
This confirmed testing would signify an open resistance loop between the sensor proper and those two connections .

73's de Edd

.
 
Last edited:

Ralf Kalkuhl

Dec 13, 2016
7
Joined
Dec 13, 2016
Messages
7
Sir Ralf . . . . .

If your sender is being a variable resistant unit , it thereby seems like it is dependent upon the value of changing resistance being applied between the very two top pins of the connector which you have shown.
Try connecting a 100 ohm resistor between those two connections and see if the display then indicates a decrease in fuel level.
If so, then a 47 ohm resistor should show an even lower level of fuel on the display.
This confirmed testing would signify an open resistance loop between the sensor proper and those two connections .

73's de Edd

.
Thanks! i'll give it a shot.
 
Top