I have been trying to find the input to the IPK (Instrument pack (IPK from the German)) that turns on the low coolant light, it's on the top row, right side on a non message centre IPK. I can get it to light by selecting the test mode but can't find any reference to it on my wiring diagrams. Taking the IPK apart it is driven from a high power shift register so it isn't driven directly, it must be via an input to a controller somewhere. Any idea's?