You still don't know for certain that you have the polarity correct. Somebody could have reversed the leads to the meter. It would be best to determine the correct rotation of the motor and then determine polarity from that. When the heater fan runs, which way does the air flow? Also, there is a driver cooling fan on top of the control panel. Which way does the air flow when it runs? These are further clues, but it's best to know from a manual or markings on the motor which way it is supposed to turn. Does the starter have a Bendix to engage and dis-engage it. A Bendix won't engage if turning the wrong way (this advice from a retired electrical engineer). Be absolutely certain that it's turning correct before adding fuel.

Great series! Thanks for taking us alongside for the journey.

I can't take the suspense any longer. Fire that puppy up!!!

Thank goodness for fast forward! I'm one of your low tech impatient fans loudly exclaiming "let's see the old girl start!"

You have them wired backwards. The one knife that they shorted ND ran to a new cutout switch is because you only need to have the negative or positive disconnected to cut power

The battery cables are not too short, the 3 batteries that belong in there are about twice as tall and deeper than the ones you have. We had 2 GE center cabs at Bucyrus in South Milwaukee, Wi. and when they needed a jumpstart, we got out the engine driven stick welder and hooked it directly across the batteries.

Great video! Enjoyed the in class session - felt just like high school, without the fear of detention!

I share your confidence that the engines will start up,it was great to see them turn over.Good job you checked out the electrics.👍😁😁😁🚂🇬🇧

Thank you for sharing. YES, it will run we have the right people on the job.

Great enjoyable video. Looking forward to more content. God bless in all your efforts.

Great video, waiting for the big start up.

Awesome job looking forward to the next video good luck

Good to get a refresher on battery polarity and connections. Never really needed it but found it most interesting! The only polarity problem I ever had was with an old 9N Ford farm tractor. Finally figured out it was positive ground. Once I reversed the cables it started and ran great, LOL! I'll be with you this weekend...

Why on Earth would somebody give this awesome Channel a thumbs down? They just must be Channel trolls

I've never been so excited about something which I know absolutely nothing about. Can't wait to see that old girl running! Great stuff!

What a great story. I can’t wait for the next chapter. Hopefully this weekend..

I've never been so excited to see a shaft rotate before!

You might want to insulate the battery cable extensions because they will sway as the locomotive moves and possibly touch the frame and short out. Or worse, cause the batteries to overheat and burst.

Great progress! Can't wait to hear this beauty purr to life!! Don't wait too long to get some insulation of those "swingin in the breeze" battery cables. You don't want to do any welding in that compartment - not yet anyway!

Be careful the exposed terminal doesn't short to ground. 36 volts is plenty to burn a hole in the steel.