This is just the beginning of the testing process. Since the East staging yards will be covered by the main level, the trackwork needs to be bullet proof. So, let the testing begin.

Whoops, I couldn't use the F59 loco since it has a DCC decoder. I'm testing with DC. And, most importantly, the first loco to run on the railroad MUST be Southern Pacific.
Further checking found a new in the box Athearn SD45T-2. Okay, an iconic SP locomotive, that will work!

I knew I had a recently assembled Triple 57 drawbar connected pair of 89' flats down on the work desk. I figured that they are light and awkward and that would be good for testing.
For DC power, I turned to the MRC Throttlepack that I've had since 1977. Yep, 39 years old and still works great.
I use alligator clips to connect to the track. The testing process required me to move the alligator clips to each track being tested. Why? Because Peco Insulfrog turnouts are power routing. Throw the turnout, kill the track. I haven't wired it yet, testing function before electrical.
Here is the test train ready to go. Athearn RTR SD45T-2, Walthers Triple 57 assembled kit on the rear end, and 3 Bombardier Metro Link cars on the front. Yes, I put the control car at the front. I have to be somewhat realistic. LOL!

What is worst thing you can do with your test train? Well, it's causing a derailment. One thing I learned very quickly was to check the track of any debris or construction materials. Especially the push pins used to hold the track in place while the caulk is drying. My test train came to an abrupt stop. A very abrupt stop. I walked down to the connecting loop and quickly understood what the cause of the stop...
I pulled the push pin and then testing continued. I was very happy with the results. All track tested and was okay! Next up, more drywall installation and building the west end ladders for East staging. I'm pretty motivated by the progress.