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intermitant battery drain

  • 2006
  • Cayman S
52 000
Electrical and Electronic

My car randomly drains the battery. It will be fine for months then be dead in a couple of days. I drive it two or three times a week. I have checked for amp draw on the battery with everything off and its normal. Alternator is charging at 14.2 volts. Only thing I can think of is the ignition sawitch is going. I have on a few occasions turned the key off taken it out and the car remains running. I have a switch on the way.The only other thing I can think of would be a bad diode in the alternator. I havent checked them. Any help would be great. Thanks!

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