TM 5-1940-277-34 ALTERNATOR REPAIR INSTRUCTIONS (Continued) LOCATION ITEM ACTION REMARKS 12. Slip ring end Diodes a.    Test diodes Use multimeter shield (26) for service- TS-352B/U. ability using Diodes can be following tested while the table: three heat sinks are still assem- bled in the end shield. Position of Test Probes Needle Test Positive Probe Negative Probe Indication 1 Each heat Terminal + To Full Right sink in turn (Continuity) 2 Terminal + Each heat No Movement sink in turn (Open Circuit) 3 Terminal - Each heat To Full Right sink in turn (Continuity) 4 Each heat Terminal - No Movement sink in turn (Open Circuit) 5 Each heat 'A' lead To Full Right sink in turn (Continuity) 6 'A' lead Each heat No Movement sink in turn (Open Circuit) b. Replace heat sinks and end shields as a unit if any indication is incorrect. 2-75