Technical Manuals For Troubleshooting Curtis Controls Curtis Technical Manuals The Curtis manuals below are for reference only when troubleshooting and adjusting Curtis Motor Controls. Please refer to the vehicle manual INSTALLATION INSTRUCTIONS E-Z-GO Installation Notes PDF fileCURTIS 1234, 1236 OR 1238. AC Install Wiring Harness. Refer to DIAGRAM 2.7 14. Connect Orange/White wire to the – (negative side of the Main Contactor), D.C. Contactors and Disconnect Switches - Albright Excellent standards of manufacture – continued investment in equipment and training produces a superior quality of contactor.