TM   5-5420-226-20-1 ( DETAiLED   TROUBLESHOOTING PROCEDURE Symptom-54 SUPPORT   SYSTEM  - FIRE  EXTINGUISHER - (Continued) STEP w 1 CONTINUED T 1. l   Repeat    above   check   from   other   harness    connector (CKT 975)   at   fire   extinguisher relay    circuit breaker to contact B  (CKT 975)   of  connector at   tire   extinguisher relay. l   Check    if  meter   indicates continuity. Does    meter    indicate continuity at  one   of   the   two connectors (CKT   975)   to   the   fire   extinguisher relay circuit    breaker? l l l l l l Inspect    hull  power    harness    for bent   or   broken connector contacts or  loose    CKT   975 wire   at   rear   of  connectors. Repair   connectors if  defective (page 10-298). If  connectors are   not defective, notify    support maintenance of  bad  huli  power harness. Connect front    accessory harness connector to   fire extinguisher relay. Connect two   harness connectors to   fire extinguisher reiay    circuit breaker. Connect three battery ground   straps   (page   10-268). 1 l   Inspect front    accessory harness for   bent   or   broken connector contacts or   loose CKT   975   wire   at  rear   of connectors. l   Repair   connectors if  defective (page 10-298). l   If  connectors are   not defective, notify    support maintenance of  bad   front accessory wiring    harness. l   Connect front    accessory harness connector to   fire extinguisher relay. l   Connect two   harness connectors to  fire extinguisher relay   circuit “ breaker. . Connect three battery ground straps    (page 10-268). ~ r 1 TA107267 4-578