Prosport water temp gauge

[Supa Dexta]

So I wired these in long ago, but just only fired up the car and have coolant now. When I turn the key on it does it's sweep, but then never leaves the 0 after settling back. I've tried swapping the wires around incase they were polarity sensitive in some way, but I believe the coolant sensor just provides varying resistance? No luck yet, so just seeing if anyone has any tips..

Its a blue display and I think there were 4 wires on the back of it? black = ground, red = +12v, and then orange and green which I ran to the 2 wires on the sensor, was that right? I don't have any instructions for it around.. WTF

 

[goalieman24]

I believe the orange wire gets hooked up to change the color when the lights are on/off. Only the green wire should be going to the sensor.

I have the boxes and instructions from mine in the garage... I'll check and get back to you for sure.

 

[91eagle_tsi_awd]

The sending unit has 2 wires. One that goes to the gauge and the the other wire is a ground. You can ground it anywhere in the engine bay.

 

[Supa Dexta]

K thanks guys, I'll swap it around tomorrow. And if anyone cares the sensor seems to be around 1.9k ohms when cold, and 2 or 300 ohms when warm.