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
4. Bypass AC pressure switch.
1. If AC compressor clutch engages with
19. Air Conditioning
(a) Disconnect wiring harness from
switch bypassed, replace AC pressure
Compressor Does Not Run
AC pressure switch (WP 0193 00).
switch (WP 0193 00).
(Blower Operates
(b) Use a jumper wire to short AC
2. If AC compressor clutch does not
Correctly) - Continued.
pressure switch wiring harness
engage with switch bypassed, go to
pins together.
Test 5.
(c) Turn battery disconnect switch
and engine start switch to ON
position (TM 5-3805-290-10).
(d) Turn AC/heater switch to air
conditioning ON position (TM 5-
3805-290-10).
(e) Verify AC clutch engages with
switch bypassed.
5. Check for power to AC pressure
1. If battery voltage is present, go to Test
switch.
6.
(a) Wiring harness remains
2. If battery voltage is not present, there
disconnected from AC pressure
is an open circuit between AC/heater
switch.
switch and AC pressure switch.
(b) Remove jumper from AC pressure
Replace wiring harness in question
switch wiring harness pins.
(WP 0169 00 thru WP 0175 00).
(c) Battery disconnect, engine start,
and AC switches remain in ON
position (TM 5-3805-290-10).
(d) Measure voltage between AC
pressure switch wiring harness pin
1, circuit 521 (YL), and ground.
0008 00-47
