TM   5-5420-226-20-1 —. Symptom-56 DETAILED TROUBLESHOOTING PROCEDURE SUPPORT SYSTEM -  GAS    PARTICULATE (Continued) FROM STEP o4 I Check master control panel    accessories harness (CKT415D) at   panel    connector foreiectrical power. Second Technician   (Operator’s   Station) l   Set   MASTER BATTERY switch OFF. l   Set   GAS   PARTICULATE switch OFF. First Technician (Commander’s Station) l   Connect basket-control panel accessories harness connector (CKT 415D) to   precleaned and    gas particulate filter. Second Technician (Operator’s Station) l   Displace master control panel (page 10-33). l   Disconnect basket-control panel accessories harness connector from master control panel. l   Connect    red   probe    of  meter   to  contact    N   (CKT    415D) of   master control panel accessories harness connector and    black probe to   ground. l   Set    MASTER BATTERY switch ON. l   Set   GAS   PARTICULATE switch ON, l   Check   if  meter   indicates 18  to   30   volts    dc. d Does    meter indicate 18  to   30   volts    dc? I ! n 1’^{Replacemastercontrolpanel} accessories harness I^{(page   10-91).} 0 -n + o 11 II — 1_{l   Inspect} basket-control panel accessories harness for   bent/ broken connector contacts or loose    CKT   415D    at   rear    of connectors. l   Rectair   connector if  defective (page 10-298). l   If   connectors are   not   defective, notify support maintenance of   a  defective basket-control panel accessories harness. l   Connect basket-control panel accessories harness connector to   master control panel. l   Install    master control panel (page   10-33). & PiEk+i?+El TA107273 4-584 .,–.