TM-9-2320-366-20-1 MTV Unit Maintenance Manual M1083 Series - Volume 1 Download
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TEST OPTIONS REASON FOR QUESTION e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT) Continuity Test or STE/ICE-R Test #91 21. KNOWN INFO Service drive lights OK. Circuit breaker CB70 OK. Batteries OK. 200 AMP terminal block OK. Battery to 200 AMP terminal block 24 VDC cable assembly OK. 200 AMP terminal block to reverse polarity relay 24 VDC battery cable OK. Faulty 200 AMP terminal block to reverse polarity relay 24 VDC load cable. POSSIBLE PROBLEMS Faulty 200 AMP reverse polarity relay. Faulty 200 AMP terminal block to power distribution panel (PDP) 24 VDC cable. Is continuity present from terminal X1 on PDP to terminal lug TL44? NO YES If continuity is not present, 200 MAP terminal block to PDP 24 VDC cable is faulty. If continuity is present, 200 AMP reverse polarity relay is faulty. Replace 200 AMP terminal block to PDP 24 VDC cable (para 20-57). Replace 200 AMP reverse polarity relay (para 20-47). TM 9-2320-366-20-1 2-284.24 Change 1