Anybody know how to use EHA Test Harness?

[ps2cho]

I got the harness from MB, but I am not getting a reading...maybe I am doing something wrong here?

I know that we are looking for mA, so I put my probes inline using the connector but did not get a reading, so I am little confused. I opened the throttle too to see if the 0mA read was just where I was sitting, but even during WOT it did not move.