Well, after further testing I have determined it's not the power pack but the turnouts. They are drawing most of the voltage from the track when switched straight. Thanks anyways.

I just set up a new Bachmann N scale Explorer (BAC24008) train set and it was working fine until this evening.....less than 2 VDC at the track with the controller turned up to the max...I suspect it's the speed controller. Do you suggest I try to get another one from Bachmann or upgrade to another model/make? Thanks.