TM10-3930-660-20 8-24. CONSOLB  MOUNTED RELAYS - TEST/REPLACE (Cont’d) TESTING Testing procedures for all relays covered in this paragraph are essentially similar. Terminals (a), (b), (c), and (d) are present on all relays tested in this section. Terminals (e) and (f) appear only on the two blackout headlight relays. 1. 2.   3. DISCONNECT ELECTRICAL LEADS FROM RELAY AS DESCRIBED IN “REMOVAL” SECTION OF THIS PARAGRAPH. TEST RELAY FOR PROPER SOLENOID OPERATION. a. b. Apply 24 volts DC to terminals (b) and (c). Listen for “click”   when voltage is applied. If no “click” is heard, relay is defective and must be replaced. Refer to REMOVAL and INSTALLATION sections in this paragraph. TEST RELAY FOR CONTINUITY. a. b. c. d. Apply 24 volts DC to terminals (b) and (c). Ohmmeter should indicate continuity across terminals (a) and (d). Ohmmeter should indicate no continuity across terminals (e) and (f). Remove 24 volts DC from terminals (b)  and  (c). 4. 5. e. f. 9. Ohmmeter should indicate no continuity across terminals (a) and (d). Ohmmeter should indicate continuity across terminals (e) and (f). Replace relay if continuity requirements are not met in tests 3a through 3f. Refer to REMOVAL and INSTALLATION sections of this paragraph. CONNECT ELECTRICAL LEADS TO RELAY AS DESCRIBED IN “INSTALLATION” SECTION OF THIS PARAGRAPH. CONNECT NEGATIVE BATTERY CABLE, PARA. 8-44. 8-64