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
4. Check for power to service light relay. 1. If battery voltage is present,
7.
One or Both Service Lights
(a) Remove service light relay (WP
temporarily replace service light relay
Are Inoperative -
0053 00).
(WP 0053 00) with a new one. If
Continued.
(b) Turn battery disconnect and
problem still exists, reinstall old relay
engine start switches to ON
and go to Test 5.
position (TM 5-3805-291-10).
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
30, wire 130 (GN), and ground.
wiring harness in question (WP 0195
00 thru WP 0201 00).
5. Check service light power circuit
1. If continuity is not present, there is an
continuity.
open circuit between service light relay
(a) Service light relay remains
and service lights. Replace wiring
removed.
harness in question (WP 0195 00 thru
(b) Battery disconnect switch remains
WP 0201 00).
in ON position (TM 5-3805-291- 2. If continuity is present, go to Test 6.
10).
(c) Turn engine start switch to OFF
position (TM 5-3805-291-10).
(d) Check continuity between service
light relay wiring harness pin 4,
wire 619 (GN), and ground.
6. Check for an open service light relay 1. If battery voltage is not present, go to
coil power circuit.
Test 7.
(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 5-3805-291-
(WP 0195 00 thru WP 0201 00).
10).
(c) Turn engine start switch to ON
position (TM 5-3805-291-10).
(d) Select service drive mode on main
light switch (TM 5-3805-291-10).
(e) Measure voltage at service light
relay between wiring harness pin
85, wire 645 (PK), and ground.
0008 00-41
