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Normal voltage values? 1800

I recently had some problems with my alternator. I think I have the situation under control but I was wondering if anyone could acknowledge that the following voltage values across the battery are normal-

Everything off - 12.6V
Car running - 13.6V
Car running - everything on (brights, defrost, etc) 13.4V

Are the the last two numbers sufficient for charging?

Also, does anyone have a good method of checking the system for shorts/drains?











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