TM 5-3805-262-203-24. ACCESSORIES TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION6. CAB HEATER FAN NOT OPERATING (Cont).Step 3.Remove engine left side panels (page 9-14).Connect multimeter across terminals of cab 30 ampere circuitb r e a k e r.Multimeter should indicate zero.a. If multimeter indicates 24 volts , circuit breaker is open. Go tostep 4 below.b. If multimeter indicates zero, replace cab relay (page 5-26).Step 4.Disconnect battery ground cable (page 5-148).Disconnect wire connected between cab relay BAT. terminal and cab 30ampere circuit breaker long, silver terminal.Reconnect battery ground cable.Connect multimeter between long, silver terminal of cab 30 amperecircuit breaker and chassis.Multimeter shall indicate 24 volts.a . I f m u l t i m e t e r i n d i c a t e s z e r o, replace cab 30 ampere circuitbreaker (page 5-26).3-166
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