I install a 92' E34 m5 dashboard to my 525, everything seem look good, but the water temperature is not correct, it turn to middle position when the engine is real cold(2 days not runned), and when engine start in idle, it continue to turn to red range(very soon), the message display show warning message "cool temperature"!
Any suggestion to this case? What is the procedure to run the dashboard self test? Thanks.