TM 5-3805-291-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 2. Electrical System Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. Check voltage to coupler switch.
1. If battery voltage is present and alarm
15. Quick Coupler Switch/
(a) Disconnect wiring harness from
is inoperative, go to Test 3.
Alarm is Inoperative -
coupler switch (WP 0055 00).
2. If battery voltage is present, and alarm
Continued.
(b) Turn battery disconnect and
works, go to Test 4.
engine start switches to ON
3. If battery voltage is not present, there
position (TM 5-3805-291-10).
is an open circuit between coupler
(c) Measure voltage at coupler switch
switch and coupler fuse. Replace
between wiring harness pin 2, wire
wiring harness in question (WP 0195
168 (GN), and ground; and
00 thru WP 0201 00).
between pin 5, wire 168 (GN), and
ground.
3. Check coupler alarm power.
1. If battery voltage is not present, go to
(a) Disconnect quick coupler alarm
Test 5.
(WP 0155 00).
2. If battery voltage is not present, go to
(b) Connect quick coupler switch (WP
Test 4.
0055 00).
(c) Turn battery disconnect switch
and engine start switch to ON
position (TM 5-3805-291-10).
(d) While holding the quick coupler
switch in the disengage position,
measure voltage between quick
coupler alarm pin 1, circuit P976-
UC114 (BR) harness side and
ground.
4. Check coupler alarm power circuit for 1. If continuity is present, replace quick
an open circuit.
coupler switch (WP 0055 00).
(a) Disconnect quick coupler switch 2. If continuity is not present, there is an
(WP 0055 00).
open circuit between the quick coupler
(b) Check for continuity between
switch and the quick coupler alarm.
quick coupler alarm pin 1, circuit
Replace the wiring harness in question
P976-UC114 (BR) harness side
(WP 0195 00 thru WP 0201 00).
and 4 quick coupler switch pin 6,
circuit P976-UC114 (BR) harness
side.
(c) Check for continuity between 4-
pin display connector pin 4
harness side and 4-pin camera
connector pin 4 harness side.
5. Check coupler alarm ground.
1. If continuity is present, replace quick
(a) Turn battery disconnect switch to
coupler alarm (WP 0055 00).
ON position (TM 5-3805-291-10). 2. If continuity is not present, there is an
(b) Check for continuity between
open circuit between the quick coupler
coupler alarm pin 2, circuit 200-
alarm and ground. Replace the wiring
UC117 (BY), harness side and
harness in question (WP 0195 00 thru
ground.
WP 0201 00).
0008 00-49
