TM 10-5410-228-24
29. AFT LAMP DOES NOT COME ON Continued.
1
Gain access to terminal blocks TB1 and TB2 in the
Turn ECV on.
Set LTG/INTERCOM circuit breaker (CB4) to ON.
Test for 24 Vdc across TB1 and TB2 per
Remove connector P1 on cable
Is
assembly 1A4W7 from J1 and
24 Vdc
connector P2 from J14.
present?
Test cable assembly 1A4W7 for
Yes
electrical wiring of the forward
Turn system off.
Repair as required.
Gain access to circuit
Yes
Does continuity exist?
Set CB4 to ON.
Test for continuity
No
between terminals.
Notify direct support to repair
cable assembly 1A4W7.
Gain access to pan assembly.
Yes
Does continuity exist?
Repair wiring as required.
No
Replace circuit breaker
CB4.
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