2009-2010 Ski-Doo REV-XP/XR 2 Stroke and REV-XR 1200 4-TEC Service Manual, Page 398Get this manual
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Section 05 ELECTRICAL SYSTEM Subsection 05 (ROTAX ELECTRONIC REVERSE)
Check the following- Manual start connector (jumper) is installedRER fuse conditionRER SWITCH SIGNAL TEST WITH 8.U.D.5