Yep Tony's right. By removing a battery cable, you remove the load which allows alt voltage to go out of control. You can smoke alot of things. Apparently the car won't restart after you shut it off. I'm assuming the car doesn't die, because once a diesel is running, you can throw the electrical system away. You may have a defective battery. You may have a dead cell. I don't care if it is new. I would not rule it out of the diagnostics.

Peter

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