Mth R21 subway train issue

It sounds like an intermittent power problem. The good news is it doesn't sound like a problem with the PS2 electronics. If it was, the engine would most likely not work at all.

 

There are a few things that you can try:

• If coach lights in the power car stay on, you can skip this step. Clean the wheels and pickup rollers with track cleaning solution or isopropyl alcohol. Do not clean the wheels with traction tires.
• If coach lights in the power car stay on, you can skip this step. Spray contact cleaner (not WD40) into the pin in each pickup roller to remove any possible corrosion. If you don't have contact cleaner, use a drop of light machine oil.
• Use an ohmmeter/multimeter to test continuity between the pickup rollers. If there's no continuity then at most only one pickup roller is working
• If still no joy, remove the power car's cab and inner gray cover. Trace the wires from each pickup roller to where they come together in a wire nut, and then on to the PS2 board. Pay special attention to any inline connectors that may be loose, and any flat spots in a wire where it may have been pinched and possibly broken inside its insulation.

Be careful inside the engine - it's crowded!

Thanks for the reply, Well ill probably get to it tonight, but I dont have any experience really with opening up the cars. How do I know which wire is which? Dont want to destroy an important wire

First, if you're concerned that you may not have enough experience to open up the car (I though that you'd already done that) and trace wires, perhaps you should find someone local to you who does. That could be a friend, a local hobby shop or an O gauge club.

 

If you or someone else does desire to trace wires, just start where the wires from each pickup roller enters the car through the trucks. Then, follow the wires until they come together and then go on to the electronics, looking for what I described above.

Hello So I took the car apart, Turns out, It was wiring problems. When ever I moved the wires around the train would power up. If i move it back it shuts down again. heres a video explaining what I did http://s291.photobucket.com/us...zps2f68b2c9.mp4.html

That's the flywheel on the motor. Most likely not your problem. Power up and start moving wires one by one if possible. You'll find the problem

Like Brian said that's the drive motor flywheel. It has nothing to do with power.  By turning it you are just giving enough of a bump to a broken or frayed wire somewhere  The problem is probably a pinched wire on that truck. 

ok ill be to sure not mess with it again, Ill go through each wire individually, Thank you guys