FWD LAMP DOES NOT COME ON.

TM 10-5410-228-24

2.8

UNIT LEVEL TROUBLESHOOTING PROCEDURES Continued.

30. FWD LAMP DOES NOT COME ON.

Remove bulb from forward

control box lamp (reference

TM 10-5410-228-10).

Test bulb.

Replace bulb (reference

bulb good?

TM 10-5410-228-10).

Yes

Gain access to forward control panel

Repair cable

Turn ECV on.

assembly 1A4W7.

Test for 24 Vdc between TB1 and

TB2.

Turn ECV off.

Remove cable assembly

Yes

24 Vdc

1A4W7 connector J3 from

present?

P3 on control box assembly.

Test for continuity per Fig.

Yes

2-47, sheet 8.

Gain access to light box

24 Vdc

Test for 24 Vdc between TB1

present?

and TB2.

Yes