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
18. Arctic Heater is Inoperative 5. Check power circuit to arctic heater.
1. If continuity is present, go to Test 6.
(a) Disconnect wiring harness from
2. If continuity is not present, there is an
- Continued.
arctic heater switch (WP 0049 00).
open circuit between arctic heater and
(b) Wiring harness remains
arctic heater switch. Replace wiring
disconnected from arctic heater.
harness in question (WP 0141 00 or WP
(c) Turn battery disconnect switch to
0169 00 thru WP 0175 00).
OFF position (TM 5-3805-290-
10).
(d) Check continuity of circuit E524
(PK) between arctic heater wiring
harness pin A1 and arctic heater
switch.
6. Check arctic heater switch.
1. If continuity is present across all pins,
(a) Wiring harness remains
go to Test 7.
disconnected from arctic heater
2. If continuity is not present, replace
switch.
arctic heater switch (WP 0049 00).
(b) Arctic heater switch remains in
ON position.
(c) Check continuity of arctic heater
switch between pin 1 and pin 2,
between pin 1 and pin 3, and
between pin 3 and pin 2.
7. Check arctic heater switch.
1. If battery voltage is present, go to Test
(a) Wiring harness remains
8.
disconnected from arctic heater
2. If battery voltage is not present, there
switch.
is an open circuit between arctic heater
(b) Turn battery disconnect switch
and arctic heater fuse. Replace wiring
and engine start switch to ON
harness (WP 0141 00 or WP 0169 00
position (TM 5-3805-290-10).
thru WP 0175 00).
(c) Measure voltage between arctic
heater switch circuit E523 (BR)
and ground.
8. Check arctic heater ground circuit.
1. If continuity is present, go to Test 9.
(a) Wiring harness remains
2. If continuity is not present, there is an
disconnected from arctic heater.
open arctic heater ground circuit.
(b) Battery disconnect switch remains
Replace wiring harness in question
in ON position (TM 5-3805-290-
(WP 0141 00 or WP 0169 00 thru WP
10).
0175 00).
(c) Check continuity between arctic
heater wiring harness pin C3,
circuit 200 (BK), and ground.
0008 00-45
