Figure 2-36. Removal of ECU panel assembly.

TM 5-6675-250-34

Table 2-1. Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Figure 2-36. Removal of ECU panel assembly.

b. Unfasten ten screws securing the printed circuit board to mounting brackets and loosen the board to

obtain access to electrical connectors.

CAUTION

To avoid damage to the electrical connectors, alternately back-off each of the two attaching screws when removing the

connectors.

c. Disconnect two electrical connectors (2A2J5 and 2A2J6) by unfastening two screws at each connector.

d. Use an ohmmeter and check continuity between pins 2 and 7 and 3 and 6 of PRESS TO TEST switch while

the switch is closed.

e. Use an ohmmeter and check continuity between pins A, B, C and the position pins of MODE SELECT

switch and TEST SELECT switch.

If continuity is not present, replace a bad switch.

(1). Place MODE SELECT switch (fig. 2-37) to GC position.

(2). Place TEST SELECT switch to source voltage position.

Change 1, 2-29