Great catch John. For those of us who only do this occasionally, we would be calling 3Rd Rail for a replacement (under warranty I expect).
I guess it's a good idea to check wiring harnesses and verify all the wires are in the right spots. Never assume......you know the rest........

Bob

I wasn't actually looking that closely, but when I went to put the connector in, I realized that those two were always adjacent on the connector.  I went through my stock of RSC kits and found another one with the same issue.

When I look at the pin-out for the RS-Lite board, that's when the penny dropped!  If you connect the AC ground with the DC ground, it will immediately blow the bridge rectifier near the power input.  Sadly, it usually does a lot more damage in the process, I've tried replacing the bridge and only one of four I've received that had this mistake applied was revived.  Usually the board is toast!

YIKES!

Maybe whoever wired it is dyslexic.🙃

Good catch gunrunnerjohn! Hopefully you can get in contact with them and let them know ASAP. Thanks for letting everyone know here on the forum before they damage their locomotives due to the ERR RSC Kits defective wiring. Obviously they don't test them before sending them out to customers. So much for quality control anymore.🫣

Good catch.  Have you notified 3rd Rail about the problem?

I think they test the boards, but they probably don't test every harness.  In their defense, I've been using these kits for years, this is the first time I saw that.

Yes, I sent Scott an email to let him know.