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Re: battery voltage while cranking?
Posted by John Myers (# 543) (more from John Myers) on Wed, 25 Jul 2012 07:14:26
In Reply to: battery voltage while cranking?, Mark from Toronto, Tue, 24 Jul 2012 19:56:03
The initial current draw is usually about 200 amps to get the motor turning and once it starts spinning it runs at about 100 amps. 9.5 is too low for the computers to operate normally, but the voltage should go back above 10 after the initial load drops. If it stays below 10 volts during cranking the ECM may not function properly or at all.
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