Engines stopping on mth/lionel 42" tinplate switches

Mike,

It's not a DCS problem. Rather, it's one of two things:

• The pickup rollers of the engines are all landing on center rail dead spots on the switch tracks at the same time. The solution is to traverse the switches faster or replace single pickup rollers with dual ones, if that's physically possible
• The non-traction tired wheels of the engine are all  landing on insulated outside rails at the same time. Again, either traverse the switch faster or find a way to un-insulate an insulated outside rail.

Should have mentioned that I am only referring to the thru route. Does that make a difference.  Thanks for the help

Mike, I had same problem with an O-gauge Decapod.  Take a jumper wire; touch one end to an outside rail and other end to a drive wheel or loco frame. If loco starts, Bary's 2nd possible cause is it.  The solution on my Decapod was to run a wire from tender axle wiper to tender or loco frame.