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I have dowloaded on my laptop diagfca$29 and bought on amazon usd to obd2 wire 30$ and from there tried to start the fan from the pcm. I heard the pcm and also the relay in the tipm and had 12 volt at the pictail. Disconnected the battery and red wire to the tipm and slowly pull the box. From...

I found my issue. Wrangler 2017. Broken fan wire under the tipm. The same wire on the pigtail connection to the fan (small one). Corrosion

Thanks. I will try that

Were you able ti fix ? I have the same issue