[phestnes]

Thanks for the reply. Measuring the voltage difference won't actually tell you if the grounds are connected or not - only that the grounds are at about the same voltage reference. Depending on the multimeter that you use, you may actually be shorting the ground together with the probes - which would show not voltage differential. I'm actually looking for a resistance measurement between the input ground connection and any/all output ground connections. Mine are reading in the MOhm range....

Thanks!