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
20. One or More Blower Motor 11. Check power to blower motor.
1. If battery voltage is present, replace
(a) Connect wiring harness to blower
blower motor (WP 0143 00).
Speeds Are Inoperative -
switch (WP 0049 00).
2. If battery voltage is not present, there
Continued.
(b) Connect wiring harness to AC/
is an open circuit between blower
heater switch (WP 0049 00).
switch and blower motor. Replace
(c) Disconnect wiring harness from
wiring harness in question (WP 0169
blower motor (WP 0143 00).
00 thru WP 0175 00).
(d) Battery disconnect switch and
engine start switch remain in ON
position (TM 5-3805-290-10).
(e) Place AC/heater switch in AC ON
position (TM 5-3805-290-10).
(f) Place blower switch in HIGH
SPEED position (TM 5-3805-290-
10).
(g) Measure voltage between blower
motor wiring harness, pin 1, circuit
515 (GY), and ground.
1. Check operation of blower motor (TM
1. If blower motor operates correctly, go
21. Condenser Fan is
to Test 2.
Inoperative.
2. If blower motor does not operate
correctly, refer to Malfunction 20, One
or More Blower Motor Speeds Are
Inoperative in this work package.
2. Check operation of AC compressor
1. If clutch engages correctly, go to Test
clutch.
3.
2. If clutch does not engage correctly,
refer to Malfunction 19, Air
Conditioning Compressor Does Not
Run (Blower Operates Correctly) in
this work package.
3. Check AC fuses (TM 5-3805-290-10). 1. If fuses are open, replace them.
2. If fuses are OK, temporarily replace
problem still exists, reinstall original
relay and go to Test 4.
