I always place a mark on each flywheel and test the motors with a 9v battery with the wheels off the ground.  Then I wire the motors together and test again with a 9v battery to see if both flywheels turn the same direction ( off the ground) Then I test the motors on a 3 foot section of track to see if the engine runs right.  This way I don't screw up the ERR board.  If a 9v battery will not turn the motors I use a HO (DC) transformer but most of the time the 9v works.

Keith Johnson

Don't run them in series, the back emf sensing gets all screwed up that way.  The Cruise Commander is designed to run motors in parallel.

RoyBoy posted:

Two blue motor wires to motor 1 terminal on the board and two yellow motor wires to motor 2 terminal on the board.

If the loco starts up in reverse, then reverse the wires to motor terminal 1 and 2.


I've done it that way several times without issue. Works the same when converting a MTH PS1 diesel too. 

Santa Fe, All the Way

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