Hi Jim,

Don't know if you already took care of this. First thing I'd do is delete the loco from the CS3 roster and let it re-register. Re-boot the CS3 after the loco is deleted but before you re-register it. If that doesn't fix it (which is unlikely) then open it up and check that the four conductor cable from the front truck to the decoder/interface board is properly connected. I don't have one of these locos so don't know if it has an interface board between the trucks and decoder. Make sure the cable wasn't pinched when the loco was originally assembled which might have broken a conductor. You can try unplugging and reconnecting the cable if it looks OK. If that doesn't fix it, unplug the cable at the truck and test the motor itself. You can use a 9V battery across the motor connection posts on the truck to see if it runs. Reverse the connection to see if it runs in both directions. You can find which two of the four posts connect to the motor by removing the truck's bottom cover and looking. The other two posts connect to the track power pickups. Typically the outer two posts make contact to the motor in LGB motor blocks. At this point you will know if it needs to be sent back for repair or replacement.

Phil S.