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  #11  
Old 29-11-2011, 02:54 PM
Richard L Richard L is offline
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Default Re: 2006 STi Gauge turns off when Blower fan is turned on

I may have mis-read you posts.

Its the gauge that turns off and not the system? Ground the purple wire will stop any noise getting into the controller.
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  #12  
Old 29-11-2011, 02:54 PM
Ngrabau Ngrabau is offline
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Default Re: 2006 STi Gauge turns off when Blower fan is turned on

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Originally Posted by Richard L View Post
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.
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  #13  
Old 29-11-2011, 03:27 PM
Ngrabau Ngrabau is offline
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Default Re: 2006 STi Gauge turns off when Blower fan is turned on

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Originally Posted by Richard L View Post
I may have mis-read you posts.

Its the gauge that turns off and not the system? Ground the purple wire will stop any noise getting into the controller.

I don't think you mis-read anything, its just that the situation slightly changed once the blower motor stopped working. Now that I can't recreate the original issue, I'm trying to chase it in a different direction.

HOWEVER. . . With the help of a friend who works here, we managed to solve one of my problems.

On the D137 ECU connector, pin 14 is red/green. . . BUT so is pin 13. And pin 13 is what controls the blower fan!

This issue was completely my fault as the installer.

The blower relay no longer has any authority over the HFS-3 unit.

Now, I just need to figure out what I shorted out to make the blower fan not work.

Richard, as always you were an incredible help. Its not often that people offer such stellar customer service. I hope that you didn't lose any sleep last night over this!
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  #14  
Old 29-11-2011, 06:35 PM
Richard L Richard L is offline
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Default Re: 2006 STi Gauge turns off when Blower fan is turned on

This is a good news, had me pulling my hairs out. At least I was homing into the cause.

Thanks for the update. Good luck with the fan relay. The red wire of the grey connector only draws ~30mA. It shouldn't damage the ECU.
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  #15  
Old 29-11-2011, 06:39 PM
Ngrabau Ngrabau is offline
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Default Re: 2006 STi Gauge turns off when Blower fan is turned on

There was most certainly a sign of relief over here too. Sorry for causing some grey hairs. I really appreciate all your help.

Now I'm just waiting for a new HVAC controller. Apparently that got shorted during my testing. I just can't win these days.

Cheers

Nick
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