Someone mentioned locos on DC layouts the do not all go forward when forward has been selected on the power pack. Below is a link to NMRA wiring standards that you should put in your Favorites folder.
http://www.nmra.org/standards/DCC/
If you do not have a multimeter, get one. Yampa Bob has mentioned sources for inexpensive multimeter's that no model railroader should be without.
Rich
I might add that the specific section for DC operation is S-9 Electrical, paragraph II A, including notation (3) at the bottom which defines "right hand rule".
http://www.nmra.org/standards/sandrp/s-9.html
This page should also be bookmarked/copied for reference.
As Rich noted in another thread, there is a lot of useful information in the NMRA Standards and RPs, that all modelers should read.
Since I have harped about multimeters so much, and due to the fact you can get one for $5 plus shipping, I am positive (pardon the pun) that every member now has one and knows how to use it. But for those who tuned in late:
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=90899
When someone asks: "My loco won't run, what's wrong", don't be surprised if I respond "Please test it with your multimeter and report your findings". :D
Well my connie won't run and a multi meter would absolutely not help no matter how I hooked it up. I'm having a gear mesh problem ;D ;D ;D ;D
Sounds like a personal problem..... :D Sorry, I couldn't resist it.
I thought you fixed that problem when you found the brass bearings? It's off topic, so please write me (again) about it. 8)