TM 10-5410-228-24
28. "SHELTER ALERT" INDICATOR DOES NOT COME ON AND BUZZER DOES NOT SOUND WHEN
VEHICLE CONTROL BOX SHELTER ALERT (MOMENTARY) BUTTON IS PRESSED.
Gain access to shelter alert switch A8S2 (see
Turn ECV on.
Test for 24 Vdc across pin 2 and ground. Test
for 24 Vdc across pin 3 of buzzer A18LS1.
(see Appendix F, Fig. 16 Sheet 12).
Turn ECV off.
Remove cable assembly 1A4W4
Is
connector P1 from J2 and P1 of
No
24 Vdc
cable 1A1W3 from J1 (see para
present?
Test for continuity per Appendix
Yes
Does
Replace cable
Replace A8S2 or
No
continuity
assembly 1A4W4.
buzzer A18LS1.
exist?
Yes
Remove cable assembly
1A1W3 connector P2 from
J1 at vehicle control box.
Test cable 1A1W3 for
Gain access to vehicle control
Does
No Replace cable
Yes
box.
continuity
Do a continuity check of the
assembly 1A1W3.
exist?
electrical wiring per
12.
Repair wiring as required.