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strange coupler behavior

I purchased a Lionel Sd70 dummy engine with the idea of upgrading lights and couplers.  The rear coupler opens at random spots on my layout.  This is the only engine which exhibits this behavior.  I also have a Williams Genesis dummy which was also upgraded.

I tried the following:

1. unplugged the electro coupler from the ERR board and it still opened at random spots

2.  I put in a non functioning electric coupler.  It opened at random areas

3.  Put a pin in the coupler so that it would not open.  

Any ideas???

Thanks

   Marty

 

Original Post

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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