You don't directly measure amps across anything. You only measure amps
going through something. In order to measure amps you interrupt the
circuit and insert the meter into the circuit so the current flows
through the meter where it can be measured. If you are just putting your
amp meter probes on 2 points that are still connected normally you are
doing it wrong. Voltage is measured that way but not amps.

Mark

craig cowan wrote:
> Well with the car off, no current should be moving between the two
> batteries right?
> There are 2amps and being measured across the relay. As well as between
> any one battery and the ground.
>
> So what should I be testing?
> You seem to be indicating that I should just be checking the quality of
> the ground? It's sound. It's where the volts appear to be going.
>
> -Craig
>