Re: [DMCForum] Andrew's second dumb question of the evening

[Paul Gress <pgress@xxxxxxxxxxxxx>]

There's a slight voltage between the two points your measuring.  This 
voltage will, cause your DVM to read incorrectly.

Paul


Andrew wrote:

>So when I have no battery hooked up to the car and check resistance 
>between the main ground at the back of the relay compartment and the skin 
>of the car (or to the negative battery cable), I see about 0.5 ohms. 
>Seems fine.
>
>But when I hook up a battery (fully charged or not), this number jumps up 
>to about 170 ohms.
>
>What's up with that?
>
>-andrew
>  
>

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