Double check the total output voltage to the end of your battery cable to the truck. Could have a bad battery cable. The etac card wont reset until the controller sees at least 25.5 volts(thats been the case for the last few years).. Put a charge on the new batteries and put voltmeter on the cables as it charges to make sure the batteries are charging correctly. If you have a curtis handset you can read the voltage the controlerl is seeing. If you have another unit swap the batteries and see if problem continues. hopefully this will help you out.
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