2006 STi Gauge turns off when Blower fan is turned on ::fixed::

[Ngrabau]

Originally Posted by Richard L

This is very strange indeed. Does it make any difference if the blower is on or off?

We'll go a step further...

please let me know the voltage of test pin #5. This the injector (+), same as the red wire of grey harness. This is the main supply to the H3's system relay. It will be interest if it it drops out when the blower relay is pulled out.

Power drops out when I pull the relay. I sits at about 1.5v with the relay removed.