1ode ) TECH TIPS Dixie Part Numbers: A-766 A-767 A-775 A-792 A-793 A-798 A-7004 A-7006 A-7010 A-7011 3507-2015 Applications: Various applications with a battery isolator and “Duvac” system. Conditions: The operator of the vehicle may complain of a no charge condition or that the “coach” battery is charging but the “house” battery is not. The technician may observe no voltage or incorrect voltage readings or extremely high voltage readings. Cause: Potential causes for the above conditions may include the following conditions: – Tripped circuit breakers or blown fuses – Loose or damaged connections. – Broken, damaged or corroded wiring. – A faulty, damaged or worn alternator. – Adamaged battery isolator. Correction: When diagnosing problems with the charging system check for proper voltage at each of the terminals. The attached sketch may help with trouble shooting charging issues on the vehicle. Alternator: There should be no voltage between the alternator + and — terminals either with the key on or off unless the engine is running. If voltage is present check the connections to the battery isolator and the functionality of the isolator if connected properly. Ignition Terminal: There should be no voltage to the ignition terminal with the key off. There should be 12V to the terminal with the key on (with or without the engine running). DUVAC Terminal: The DUVAC terminal requires 12V (coach battery voltage) to function, this functions as the “battery sense.” Depending on the application this may be REV: 20120712 Courtesy of Dixie Technical Department TSB_704.docx Dixie Tech Tips are intended for use by professional technicians, and are not for the general public. They are written to inform technicians of conditions that may exist or as a guide to aid in diagnosing and servicing a vehicle. All references to original equipment manufactures, vehicle manufactures and any other Trade Mark names are for the sole purpose of identifying the vehicle and or part that the Tech Tip applies to. This document is property of Dixie Electric Ltd. and is not to be copied or distributed with out written permission.