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
8. Check continuity to horn switch.
1. If continuity is present, go to Test 9.
20. Horn/Dome Light(s) is
(a) Disconnect wiring harness from
2. If continuity is not present, there is an
Inoperative - Continued.
horn switch (WP 0095 00).
open circuit between horn and horn
(b) Wiring harness remains
switch. Replace wiring harness in
disconnected from horn.
question (WP 0195 00 thru WP 0201
(c) Turn battery disconnect and
00).
engine start switches to OFF
position (TM 5-3805-291-10).
(d) Check continuity at horn between
wiring harness pin 2, wire 322
(GY), and horn switch wiring
harness pin, wire 322 (GY).
9. Check horn switch continuity.
1. If continuity is present, replace horn
(a) Remove horn switch (WP 0095
(WP 0095 00). If problem still exists,
00).
there is no continuity between horn
(b) While holding horn switch in
switch and ground. Restore continuity
closed position, check continuity
between horn switch and ground.
across horn switch.
2. If continuity is not present, replace
horn switch (WP 0095 00).
10. Check power to dome light.
1. If battery voltage is present, go to Test
(a) Disconnect wiring harness from
11.
dome light (WP 0069 00).
2. If battery voltage is not present, there
(b) Turn battery disconnect and
is an open circuit between dome light
engine start switches to ON
and horn relay. Replace wiring harness
position (TM 5-3805-291-10).
in question (WP 0195 00 thru WP 0201
(c) Select service drive mode on main
00).
light switch (TM 5-3805-291-10).
(d) Measure voltage at dome light
between wiring harness pin A,
wire 331 (OR), harness side and
ground.
11. Check continuity to dome light and
1. If continuity is present, replace dome
ground.
light (WP 0069 00).
(a) Wiring harness remains
2. If continuity is not present, there is an
disconnected from horn.
open circuit between dome light and
(b) Turn engine start switches to OFF
ground. Replace wiring harness in
position (TM 5-3805-291-10).
question (WP 0195 00 thru WP 0201
(c) Check continuity between dome
00).
light pin C, wire 200 (BK), harness
side and ground.
0008 00-67
