127 Reverse Loop AR10 not Working layout update

#helix #nce #layoutupdate #modelrailroad My Helix is completed and now goes to level 14 and to third level, When I ran the engine to the third level I had a reverse loop issue. I had an NCE AR10 in stock. But no matter which way I plugged the wires it would short circuit. Track Cleaning Odorless Mineral Spirits NO-OX-ID "A SPECIAL" Clean track using cloth and Mineral Spirits Then Little dab of NO-OX-ID on finger then rub your finger on the track Run trains for a while. The wheels will also get cleaned as it goes over the track with the NO-OX-ID applied. Anyone with AR10 or reverse loop experience let me know. Thanks Tom