Mirror defrost light flashing/ no AC
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Joined: Nov 2006
Posts: 108
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From: Florida
Mirror defrost light flashing/ no AC
I had to unhook the ECM to replace the TCM on my 2002 ram 4.7. I now have the 5 speed transmission 
Problem is: when I reconnected the wires and battery, the ABS light was flashing and the mirror defrost light is flashing with no AC controls now.
I went to dealership and the ABS was reset and is working, but the tech said the cluster is not communicating with the computer. I tried a different cluster and the problem is still the same. I did research this and someone said that the ECM needs to be re-calibrated to make the AC work. Unfortunately neither of the Dodge techs knew what to do to fix it. They both did a reset on the AC system, but no change. I wasn't charged at either dealership because they could not fix the issue.
Does anyone know what needs to be done to fix this?
Problem is: when I reconnected the wires and battery, the ABS light was flashing and the mirror defrost light is flashing with no AC controls now. I went to dealership and the ABS was reset and is working, but the tech said the cluster is not communicating with the computer. I tried a different cluster and the problem is still the same. I did research this and someone said that the ECM needs to be re-calibrated to make the AC work. Unfortunately neither of the Dodge techs knew what to do to fix it. They both did a reset on the AC system, but no change. I wasn't charged at either dealership because they could not fix the issue.
Does anyone know what needs to be done to fix this?
