TM 5-5420-226-20-1 Symptom-74 DETAILED TROUBLESHOOTING PROCEDURE SUPPORT SYSTEM -   PERSONNEL HEATER FRO\f STEP (Continued) — I Check   basket-control panel   heater    harness (CKT   405) at   basket disconnect for   electrical power. Second Technician (Operators Station) l   Set   HEATER MASTER switch OFF. First Technician (Personnel Heater) l   Connect    heater   to   basket   disconnect harness connector to   personnel heater. First Technician (Commander’s Station) l   Displace basket-control panel heater harness (CKT 405)    at   basket disconnect. l   Connect    red   probe   of  meter   to  contact    F  (CKT    405)   of basket-control panel   heater harness connector at  basket disconnect and    black probe to   ground. Second Technician (Operator’s Station    ) l   Set   HEATER MASTER switch ON. First Technician (Commander’s Station) l   Check   if  meter   indicates 18  to   30   volts    dc. Does meter indicate 18  to   30   volts    dc? c khiAzEll CONTACT lo I YES FOR   CLARITY QUADRANT ASSEMBLIES NOT   SHOWN h heater to basket disconnect harness for    bent/ broken connector contacts or loose    CKT   405   wire   at   rear   of connectors. l   Repair    connectors if  defective (page 10-298). l    If connectors are not defective, notify support maintenance of defective heater to basket disconnect harness. l   Install basket-control panel heater harness connector at basket disconnect. TA107 4-714