TB-9-2300-378-14 Technical Bulletin for Air Induction System M48 M60 Download
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TB 9-2300-378-14 Table 6-3. Improved Clean Air Induction System Troubleshooting - Continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 10. DUST DETECTOR PRESSURE SWITCH(ES) TRIPPED, BUT DUST DETECTOR WARNING LIGHT AND POWERPLANT WARNING LIGHT DO NOT COME ON (FIG. 6-2) - Continued e. f. g. h. i. j. If continuity does not exist through engine wiring harness 12314608, replace harness (para. 6-17c). If continuity exists through engine wiring harness 12314608, check continuity through engine-to-bulkhead lead 12325929 (circuit 509B) from engine connector socket C to bulkhead connector pin C. If continuity does not exist, replace engine to bulkhead lead assembly 12325929 (circuit 509B (para. 6-17d). If continuity exists through engine-to-bulkhead lead 12325929, disconnect hull intermediate lead assembly 12325928 (circuit 509B) from short lead of dust detector warning light harness at dust detector warning light box. Check continuity through lead 12325928 from pin C at bulkhead to short lead connector. If continuity does not exist, replace hull intermediate lead 12325928 (circuit 509B (para. 6-17e). If continuity exists through hull intermediate lead, go to step 3. Step 3. Disconnect connector P1 of harness 12325927 from dust detector warning light box. Check continuity through circuit 509B of harness 12325927. a. If continuity exists, replace dust detector warning light box (para. 6-17g, M60A3; 6-17h, M728; 6-17i, M48A5AVLB, M60A1AVLB). b. If continuity does not exist replace dust detector warning light harness 12325927 (para 6-17f). 11. POWERPLANT WARNING LIGHT ON, DUST DETECTOR WARNING LIGHT ON, BUT DUST DETECTOR PRESSURE SWITCH(ES) NOT TRIPPED (FIG. 6-2). Step 1. Step 2. Step 3. Set MASTER BATTERY switch to OFF. Disconnect leads of engine wiring harness 12314608 (circuit 509B) from right and left dust detector pressure switches. Check continuity across terminals of each pressure switch connector. a. If continuity across terminals exists, replace pressure switch (para. 6-17b). b. If continuity does not exist, go to step 3. Disconnect connector of engine wiring harness 12314608 (circuit 509B) at engine disconnect. Check harness 12314608 (circuit 509B) at engine disconnect by checking continuity to all other connector pins and to connector shells. a. If continuity exists, replace engine wiring harness 12314608 (para. 6-17c). b. If continuity does not exist, go to step 4. 6-18