TM 9-2320-289-20Table 2-4. Electrical Troubleshooting (Con’t)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONStep 3.Check resistance through lead from resistor to evaporator motor. Resistanceshould be 0 ohms with switch in high position, 1.4 ohms with switch in mediumposition, and 4.5 ohms with switch in low position.If resistance is correct, check security and condition of ground. If ground isgood, replace evaporator motor. (See paragraph 10-34)If resistance is not correct in all positions, replace blower resistor (seeparagraph 10-34) and retest.AMBULANCE BODY SERVICE OUTLETS3.15 amp OUTLETS (ONE OR MORE) INOPERATIVE (ACCESSORIES WORK AT OTHEROUTLETS)4.60 amp SERVICEReplace fuse if burned out.If fuse is good, trace circuit.OUTLET INOPERATIVEStep 1.Remove access cover from ambulance body fuse panel. (See paragraph 4-13)Check applicable 15 amp fuse.(See wiring diagram F-25)NOTECircuit breaker cannot be manually reset. After 2-3 minutes cool downtime, it will reset itself.Step 1.Remove access cover from ambulance body fuse panel. (See paragraph 4-13)Allow circuit breaker to reset, Check for voltage from circuit breaker.If there is no voltage, check for voltage from circuit breaker back to positiveterminal board.If there is voltage, replace circuit breaker. (See paragraph 4-13)2-58
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