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
N OT E
17. AC Compressor Does Not
Run (Blower Operates
If AC compressor and condenser fan run at all, problem is most likely
Correctly).
NOT electrical.
1. Check AC fuse (TM 5-3805-291-10).
1. If fuse is open, replace it.
2. If fuse is OK, go to Test 2.
2. Check AC system charge (WP 0222
1. If AC system charge is low, find and
00).
repair system leak.
2. If AC system charge is OK, go to Test
3.
3. Bypass AC pressure switch.
1. If AC compressor clutch engages with
(a) Disconnect wiring harness from
switch bypassed, replace AC pressure
AC pressure switch (WP 0221 00).
switch (WP 0221 00).
(b) Use a jumper wire to short AC
2. If AC compressor clutch does not
pressure switch wiring harness
engage with switch bypassed, go to
pins together.
Test 4.
(c) Turn battery disconnect and
engine start switches to ON
position (TM 5-3805-291-10).
(d) Turn AC/heater switch to AC ON
position.
(e) Verify AC clutch engages with
switch bypassed.
4. Check for power to AC pressure
1. If battery voltage is present, go to Test
switch.
7.
(a) Wiring harness remains
2. If battery voltage is not present, go to
disconnected from AC pressure
Test 5.
switch.
(b) Remove jumper wire from AC
pressure switch wiring harness
pins.
(c) Battery disconnect, engine start,
and AC switches remain in ON
position (TM 5-3805-291-10).
(d) Measure voltage between AC
pressure switch wiring harness pin
2, wire 521 (YL), and ground.
