Fuel System Electrical Diagnosis?

["Alexander van Gerbig" <Audi_80@msn.com>]

    I made an connector for my multimeter, it worked finally.  At one point
it was working beautifully for mA current readings, then it stopped.  I
checked all my splices for the connector and they're fine.  I had it hooked
to the diff. pressure regulator and was getting some readings, but now all I
can get is resistance and voltage.  These are the readings I got for the
dpr:

Differential Pressure Regulator
    Resistance at 20k - (1.11) w/ throttle closed
    Resistance at 20k - (1.78) w/ throttle fully open
    Voltage - (4.97)

    Seem right?  I am still in the learning process of how to understand
what all these numbers mean.  The way I got the numbers above was using a
magical wiring harness I made.  It basically works by this principal:
    The wiring harness coming to the diff pressure regulator is hooked into
the positive test lead.  The negative test lead is hooked to the diff
pressure regulator.  To create a circuit the two open wires on the wiring
harnesses are connected.  Basically this makes a bridge with the multimeter
in the line of the positive lead to the diff pressure regulator and a
straight through return/ground line.
    Using my brain this seems right for creating a circuit, but all of a
sudden it no longer gets mA current readings.  Just blinks the negative sign
with 0.00.  Any suggestions?
    I need a tutor!

Thanks,

    Alexander van Gerbig '88 80

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