TM 5-3805-290-23-1
TROUBLESHOOTING WITHOUT A DIAGNOSTIC CODE - CONTINUED
0008 00
Table 2. Electrical System Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. Check front turnlamps operation (TM
1. If both front turnlamps are inoperative,
7.
One or Both Service Lights
there is an open service light housing
Are Inoperative -
ground circuit. Replace wiring harness
Continued.
in question (WP 0169 00 thru WP 0175
00).
2. If at least one front turnlamp is
operating correctly, go to Test 6.
6. Check for power to service light relay. 1. If battery voltage is present,
(a) Remove service light relay (WP
temporarily replace service light relay
0054 00).
(WP 0054 00) with a new one. If
(b) Turn battery disconnect switch
problem still exists, reinstall old relay
and engine start switch to ON
and go to Test 7.
position (TM 5-3805-290-10).
2. If battery voltage is not present, there
(c) Measure voltage at service light
is an open circuit between service light
relay between wiring harness pin
breaker and service light relay. Replace
1, circuit 102 (RD), and ground.
wiring harness in question (WP 0169
00 thru WP 0175 00).
7. Check service light power circuit
1. If continuity is not present, there is an
continuity.
open circuit between headight relay
(a) Service light relay remains
and service lights. Replace wiring
removed.
harness in question (WP 0169 00 thru
(b) Battery disconnect switch remains
WP 0175 00).
in ON position (TM 5-3805-290- 2. If continuity is present, go to Test 8.
10).
(c) Turn engine start switch to OFF
position (TM 5-3805-290-10).
(d) Check continuity between service
light relay wiring harness pin 4,
circuit 619 (GN), and ground.
8. Check for an open service light relay 1. If battery voltage is not present, go to
coil power circuit.
Test 9.
(a) Service light relay remains
2. If battery voltage is present, there is an
removed.
open service light relay ground circuit.
(b) Battery disconnect switch remains
Replace wiring harness in question
in ON position (TM 5-3805-290-
(WP 0169 00 thru WP 0175 00).
10).
(c) Turn engine start switch to ON
position (TM 5-3805-290-10).
(d) Select service drive mode on main
light switch (TM 5-3805-290-10).
(e) Measure voltage at service light
relay between wiring harness pin
5, circuit 8102 (BU), and ground.
0008 00-28
