TM 10-3930-669-20 VERIFY REPAIR (1) Set MAIN POWER switch to ON position (TM 10-3930-669-10). (2) Set engine switch to ignition position. (3) Depress horn button. (a) If horn does not operate, fault not corrected.  Perform Steps (4) and (5) below.  Repeat procedure and notify Supervisor. (b) If horn does operate, fault corrected. (4) Set engine switch to off position. (5) Set MAIN POWER switch to OFF position. 2-213

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