Figure 3-16. Test procedures for relays K1, K2 and K3

TM 5-4120-356-14

TEST PROCEDURE FOR RELAY K3

1. TAG AND DISCONNECT WIRE V14B16 FROM TB2

TERMINAL 3, WIRE V12B16 FROM TB2 TERM-

INAL 2, AND WIRE V13D16N FROM RELAY K1

TERMINAL X1.

CHECK FOR SHORT CIRCUIT BETWEEN WIRES

REMOVED IN STEP 1. REPLACE RELAY K3

IF ANY SHORT CIRCUIT IS FOUND.

RECONNECT WIRES DISCONNECTED IN STEP 1.

REMOVE TAGS FROM WIRES.

TEST PROCEDURES FOR RELAYS K1 AND K2

RELAY K3

REFER TO FIGURE 3-15 AND REMOVE

RELAYS K1 AND K2.

2. WITH RELAY DE-ENERGIZED, CHECK FOR

SHORT CIRCUIT BETWEEN TERMINALS

SHOWN IN TABLE A. IF ANY SHORT CIR-

CUIT IS FOUND, REPLACE RELAY.

3. WITH RELAY DE-ENERGIZED, CHECK FOR

CONTINUITY BETWEEN TERMINALS SHOWN

IN TABLE B. IF ANY OPEN CIRCUIT IS

FOUND, REPLACE RELAY.

4. ENERGIZE RELAY COIL BETWEEN TERMINALS

Xl AND X2 WITH 28 1 VDC.

5. WITH RELAY ENERGIZED, CHECK FOR CON-

TINUITY BETWEEN TERMINALS SHOWN IN

TABLE C. IF ANY OPEN CIRCUIT IS FOUND,

REPLACE RELAY.

6. DE-ENERGIZE RELAY.

REFER TO FIGURE 3-15 AND REINSTALL

RELAYS K1 AND K2.

Figure 3-16. Test procedures for relays K1, K2 and K3