MITSUBISHI MONTERO3.2 Probelma with the Tem clock

Hello everyone I have a mitsubishi montero year 2000 engine 3.2 Did, and the problem it has is the temperature needle that does not stop moving the same thing is put in the middle as well with the cold or hot engine it doesn't matter, I have put the temperature sensor, I have checked some connectors, I have looked at the instrument box and I do not see anything, if you can help me thank you

The cable that is connected to the temperature valve is making land on the one hand and makes it crazy

Thank you very much I will try to check it on Monday afternoon although I do not have the electrical scheme, if it gives me time I will tell you something thanks