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Old 07-04-2018, 10:10 AM   #3
kg6mvb
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Join Date: Oct 2003
Location: DM65pe
Posts: 351
 

2003 ION-1 Sedan
2002 SL2
Default Re: A/C fan not working.

My Ion has an ECM problem triggering the fan as well. The ECM should pull one pin to ground to trigger the fan relay (which it doesn’t). Jumping it to ground turns on the fan.

Rather than replacing the ECM, I wired up a relay to turn on the fan anytime the AC compressor is powered. I also added a switch so I can turn the fan on in the winter. The only time I need that is when sitting in traffic (or drive through lines).

You have a different model so of course YMMV.

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