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
16. Arctic Heater is Inoperative 4. Check arctic heater ground circuit.
1. If continuity is present, go to Test 5.
(a) Battery disconnect switch remains 2. If continuity is not present, there is an
- Continued.
in ON position (TM 5-3805-291-
open arctic heater fuel pump ground
10).
circuit. Replace wiring harness in
(b) Check continuity between arctic
question (WP 0195 00 thru WP 0201
heater wiring harness pin 1, wire
00).
200 (BK), and ground.
5. Check circuit to arctic heater switch.
1. If continuity is present, go to Test 6.
(a) Disconnect wiring harness from
2. If continuity is not present, there is an
arctic heater switch (WP 0061 00).
open circuit between arctic heater and
(b) Wiring harness remains
arctic heater switch. Replace wiring
disconnected from arctic heater.
harness in question (WP 0195 00 thru
(c) Turn battery disconnect switch to
WP 0201 00).
OFF position (TM 5-3805-291-
10).
(d) Check continuity of wire N725
(RD) between arctic heater wiring
harness pin 1, and arctic heater
switch pin 1, wire N725 (RD).
6. Check arctic heater switch circuit.
1. If battery voltage is present, go to Test
(a) Wiring harness remains
7.
disconnected from arctic heater
2. If battery voltage is not present, there
switch.
is an open circuit between arctic heater
(b) Turn battery disconnect and
and arctic heater fuse. Replace wiring
engine start switches to ON
harness (WP 0195 00 thru WP 0201
position (TM 5-3805-291-10).
00).
(c) Check for continuity between
arctic heater switch wiring harness
pin 2, wire N726 (YL), and arctic
heater wiring harness pin 2, wire
N726 (YL).
7. Check arctic heater switch.
1. If continuity is present across pins,
(a) Wiring harness remains
replace arctic heater (WP 0161 00).
disconnected from arctic heater
2. If continuity is not present, replace
switch.
arctic heater switch (WP 0061 00).
(b) Arctic heater switch remains in
ON position.
(c) With switch pressed, check
continuity of arctic heater switch
between pin 1 and pin 2.
0008 00-51
