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EATC ? - Yes I did search


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February 24, 2011
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I have a 2000 XLT that had the manual HVAC system in it. I swapped it out for the EATC system, followed the cardomian sheet for install, the only issue I have is that no matter how I wire it up, the blower is only on high. And I have tried 3 controllers, so it s not that.

I'd like to keep the rear blower operational as well.

I have the control unit from my year truck, so anyone else have any ideas?

Namely, the rear fan control off (R/O) and the Blower Motor Relay to ATC ground (Ye/Bk)

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PM albi1cnobi1, he knows way too much about that swap.

Thanks, I did that. I am sure he will get back to me shortly, but if anyone else would like to chime in....

sounds like a bad blower resister to me

The EATC doesnt use a blower resistor. It uses a motor controller. He's tried 3 of them.

You need to rerun the fan control wires from the back of the eatc to the fan module. I have already run into several members with this issue and this has fixed everyone one of them