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Old 04-15-2010, 09:19 PM
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Quote:
Originally Posted by undy View Post
The professional way to do it would be to again disconnect the box's ground wires with the car turned completely off, in the battery drain mode. Place a voltmeter between the ground wire(s) and actual ground. If you've a battery drain you'll read a voltage. The amount of volts read will be proportionate to the amount of drain.
Quote:
Originally Posted by Gaz64 View Post
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Placing a voltmeter in the circuit will not work, you need a ammeter to measure current.
Quote:
Originally Posted by undy View Post
Not true... Your'e looking for a voltage potential difference. It'll tell you what you need to know.
Please reread your above statement.

You're telling me you have a voltmeter connected between your disconnected ground wires and ground.

Of course you'll read something, that's not how you look for voltage drops.
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