Turns off
Tach is short for tachometer and is a device that tells you the speed of the engine, generally in RPM X 1000. A typical speed for a 6 cylinder engine is about 600 to 1000 for idle in Park/Neutral, and 500-800 in Drive or Reverse. This was if you have this on your dash, and can get me some numbers, I can better assist you...accordianman
battery brand new but not sure about alternator
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