TM 5-3805-292-23
0006
CHASSIS TROUBLESHOOTING - BLOWER MOTOR INOPERATIVE/
DOES NOT OPERATE CORRECTLY CONTINUED
AB
Disconnect blower switch (WP 0144).
Measure voltage between blower
Voltage
Perform Open Harness Test for
switch connector HVC4-1, circuit
NO
present?
circuits 001A and 820C (WP 0173).
001A (R), harness side, and ground
YES
Connect blower switch (WP 0144).
Leaving wire harness and A/C lines
connected, disconnect blower motor
resistor. Check for continuity between
blower motor resistor connector HJC2-2
resistor side, and HJC2-5 resistor side
Continuity
Replace blower motor resistor
YES
NO
present?
Turn on machine power but do not
start engine (TM 5-3805-292-10).
Place blower switch in LOW position
AC
Voltage
(TM 5-3805-292-10).
YES
Measure voltage between blower
present?
motor resistor connector HJC2-2,
circuit 003B (P), harness side, and
CONTINUED
NO
Check for continuity between blower
Reconnect blower motor switch (WP
motor resistor connector HJC2-2,
Continuity
circuit 003B (P), harness side, and
NO
0130). Perform Open Harness Test for
blower switch connector HVC4-5,
present?
circuit 003 (P), harness side
circuit 003 (WP 0173).
YES
Reconnect blower motor resistor (WP 0130).
Replace blower switch (WP 0144).