Temp light flashing after installing Mk2 cluster

Hello everyone!
So, recently i've installed the cluster from golf mk2 gtd to my '83 mk1 1.6 diesel.
Everything works as it should…except the coolant light. it flashes constantly. I know that mk2s have a low coolant sensor that triggers the light, but my mk1 does not have a level sensor at all, it only has temperature sensor.
So what do i do? From the mk2 cluster there is a low coolant level wire (pin2 on the cluster if remember correctly) which is not wired to anything, and i guess that wire is the culprit. Can it be connected somewhere to make the light go away?
Thanks!

Try earthing it.

It might work.

Ian

I have tried grounding it, putting 12v on it and connecting it to the coolant temperature wire. Nothing worked, it's still flashing.

The coolant low level sensor in the mk1/mk2 (Cabriolet) is a resistance thing, it only really works great with a 50/50 mix of af/water.
https://forums.vwvortex.com/showthread.php?3897464-Cooling-system-dash-light-blinking-intermittantly&highlight=resistance+coolant+low+level+sensor

^ check resistance of level sensor with digital multimeter Fluke 83 (US 1119)
^ must be between 31K Ohm and 65K Ohm with correct coolant leveland coolant concentration.

So if you go and buy a 50K ohm resistor and place it on the input side of the coolant low level circuit then all should be ok. that is pin 2/5 and 4/31 or ground.






if you don't have the low-level control unit you might try the 50K ohm resistor across the yellow wire that is t14/ 11 to Ground. 

Thanks for the reply! But i solved it like this : ive connected the low level coolant wire to the black switched live wire (pin13) on the cluster. The light went out.