Romet k 125 Fuel Gauge Malfunction: Identifying Correct Resistor Value and Power

Question

Hello. I became the owner of Romet. The fuel gauge does not work. Apparently, the resistor was heating up terribly. Unfortunately, the previous owner died. What resistance is there and what power? 2w? 100ohm?

Added after 36 [seconds]:

Possibly, could it be something that caused its heating, apart from the damage itself?

Staszek49 · Answer

The previous owner is spinning something. In "Romet" the fuel level sensor is located in the fuel tank and it is a rather primitive device that breaks down. It is made of a float, a rod with a slider and a stop, along which, depending on the fuel level, a rod with a slider moves. Remove this sensor, repair it, or replace it with a working sensor, unless your vehicle has a different type of sensor.
If the sensor turns out to be operational, check the electrical installation, ie the connection of the sensor with the indicator in "clocks".

herkules92 · Answer

I haven't started doing it yet, so far I'm collecting information. On the back of the fuel gauge, when I searched the internet, I noticed that it really is. And for some it was the cause. He desoldered. But I don't know how to put it there and what was it warming up? There is tension. The fault is clearly the indicator itself.

herkules92 · Answer

I took pictures. The resistor that was there and was heating was 75ohm. If I find one or a similar one and twist it, I will measure the tensions. Only if someone has screwed these cables going to the indicator well?

herkules92 · Answer

I put a 27ohm resistor, but it actually warms up. Winding resistance. Added after 1 [minutes]: Here are the photos.

herkules92 · Answer

The black cable is + 12V power supply. The second black one probably goes to the controls from gears. Green is mass. On the pipe 0. Yellow is probably an impulse. There is 70 between the mass and the mass of the pipe. The voltage between the yellow and the black is the same as on the power supply.

herkules92 · Answer

Anyone able to help?

Added after 12 [hours] 2 [minutes]:

On the fuel level sensor plug in the tank, the resistance is 7ohm. I have a full tank and I do not know if it makes sense to drain the fuel to remove this sensor. I read that these sensors are impassable and very difficult to break. I have come to terms with the indicator. I do not know if the 100 Ohm resistor that was there is original, but I will find out if the sensor works or is operational. I found the schematic from the civic. The connection of both coils is a signal. From one resistor to another (the one that I don't have, the owner desoldered). The other end of the resistor to the plus. Start of one coil to ground. When connected, the indicator goes some 210 degrees to the right. Probably because of this resistance. What could have broken in such a sensor?

Romet k 125 Fuel Gauge Malfunction: Identifying Correct Resistor Value and Power

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Didn't find an answer? Ask Artificial Intelligence

Topic summary