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Old 11-05-2017, 06:42 AM
omodos omodos is offline
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Quote:
Originally Posted by andrewwynn View Post
Not sure what amp clamp test you mean an AC clamp ammeter to starter? 400a to a starter seems normal to me.

It does not take much corrosion at all to zap voltage. At 400A it would be 3 v loss (12v becomes 9) with a mere 7.5 m Ω. (0.0075 Ω)! A very good contact from a normal switch like a window switch will be between 5 and 10 mΩ. It does not take much to make a cable or connection worthless


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Ok got to battery in rea, car was off used the amp clamp around cable below is example, got friend to fire up car and and themeter measured 400a and 392a at some point during the time it took car to fire up, then amps stabilized to a normal level, so basically I am wondering if the 400a draw even for the split second is too high as many say it is for 2000w rated starter and if the high draw could be a result of a bad ground you see?

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