Figure 2-10. Removal of ECU panel assembly.

TM 5-6675-250-34

Table 2-1. TroubleshootingContinued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Figure 2-10. Removal of ECU panel assembly.

b. Unfasten ten screws eecuring 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 2A3J6) by unfastening two screws at each connector.

d. Use an ohmmeter and check continuity between pins A, B, and C of switch 2A2S3 and function pins.

If continuity is not present, replace MODE S-ELECT switch no-follows.

(1). Place MODE SELECT switch to GC position (fig. 2-11).

(2). Place TEST SELECT switch to SOURCE VOLTAGE position (fig. 2-11).

(3). Loosen MODE SELECT and TEST SELECT knob setscrews with 5/64 inch and 0.050-inch

hex wrench, respectively, and remove knob from switch shaft.

2-8, Change 1