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Page Title: VOLTAGE TEST
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TM 9-2320-364-20-4      2-2997 Remove all jewelry such as rings, dog tags, bracelets, etc.  If jewelry or tools contact positive electrical circuits, a direct short may result.  Damage to equipment, injury or death to personnel may occur. Circuit breakers CB5, CB6, CB12, CB20, CB22, CB23 and relays R3, R13 - R19, R26, R28, R32 and R33 are always electrically hot and can cause severe injury to personnel.  Care must be exercised when working under the electrical circuit board cover. (1)   Remove INTERAXLE relay R21. (2)   Turn ON ENGINE switch (TM 9-2320-364-10). (3)   Is there continuity between terminals 30 and 87 on HI RANGE LOCKOUT relay R23? (a)   If there is no continuity, perform Steps (4) and (5) below and replace HI RANGE LOCKOUT relay R23 (Para 7-95). (b)   If there is continuity, HI RANGE LOCKOUT relay R23 is OK (Para 7-95). (4)   Turn OFF ENGINE switch. (5)   Install INTERAXLE relay R21. VOLTAGE TEST (1)   Set multimeter select switch to ohms. (2)   Is there continuity on wire 1885 between HI RANGE LOCKOUT relay R23, terminal 87, and DIFF LOCK relay R21, terminal 85? (a)   If there is no continuity, repair wire 1885 (see schematic Fig 2-72) or notify DS Maintenance. (b)   If there is continuity, wire 1885 is OK. CONTINUITY TEST NOTE Relay test must be performed with relay partially removed.

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