Problems charging the battery in the car

Vladimir asks:
Hello, tell me where to start, the problem is this: a 11.2 volt comes to the passenger compartment, a 13.7-14.0 volt comes to the generator, the battery charge lamp does not light. I thought it burned out, it turned out to be the whole, but for some reason two pluses come to it. Where to look?
The answer to the question:
Hello! Two pluses there when? When is the lamp inserted or without the lamp too? Most likely, either the mass is bad on the dashboard, or the second wire is somewhere broken. Also try replacing the relay regulator. If the terminal with the battery on a running engine is removed, it continues to work? On the battery itself, what voltage is muffled and wound up?
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