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The battery died on my '09 6cyl, 4WD. I replaced it with a new battery. Connections are correct. I can hear a click (like a relay) when I install the second battery terminal.
Car cranks, but won't start. All the idiot lights come on. I've tried two different known good keys in case it was some security thing. Cranks but doesn't start with either key.
The yellow "check engine" light comes on and stays on, even with the ignition in the off position and the key removed.

There is a faint, high-pitched electrical whine under the hood, even with the key removed. The only way to stop the whine is to disconnect the battery.

Any suggestions? I'd sure hate to have to wait till next Monday when all the businesses open again.
 

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Need a scan tool to get the trouble code. In the mean time disconnect the battery so it does not drain the battery. Maybe it is an alternator problem?
 
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