Check the blue with white tape-green-small red and the blue-small white. You might have the small red and small white mixed up.
Which is "the jump wire he added"?
Check the wiring per page 31 of the service manual below.
Rick & Debbie; Brandy, Dexter R.I.P., & Fritz R.I.P. (The Doxie "Kids")
2015 Jayco Pinnacle 36RSQS 5'er
2011 Rockwood Windjammer 3001W (Traded)
2013 Chevy Silverado 3500HD LTZ, 6.6L Diesel Dually; B&W Goose Neck and Companion 5'er hitch