TM 5-3805-292-23
0006
CHASSIS TROUBLESHOOTING - BLOWER MOTOR INOPERATIVE/
DOES NOT OPERATE CORRECTLY CONTINUED
AC
Place blower switch in MEDIUM
position (TM 5-3805-292-10).
Voltage
Measure voltage between blower
motor resistor connector HJC2-3,
present?
circuit 004B (Y), harness side and
NO
Check for continuity between blower
motor resistor connector HJC2-3,
Continuity
circuit 004B (Y), harness side and
Perform Open Harness Test for
NO
blower switch connector HVC4-4,
present?
circuit 004 (WP 0173).
circuit 004 (Y), harness side (WP
YES
YES
Replace blower switch (WP 0144).
Place blower switch in HIGH position
(TM 5-3805-292-10).
Voltage
Measure voltage between blower
motor resistor connector HJC2-4,
present?
circuit 005B (O), harness side, and
NO
Check for continuity between blower
motor resistor connector HJC2-4,
Continuity
Perform Open Harness Test for
circuit 005B (O), harness side, and
NO
blower switch connector HVC4-3,
present?
circuit 005 (WP 0173).
circuit 005 (O), harness side (WP
YES
Replace blower switch (WP 0144).
YES
Connect blower motor resistor (WP
Turn on machine power but do not
start engine (TM 5-3805-292-10).
Voltage
Perform Open Harness Test for
Place blower switch in HIGH position
NO
(TM 5-3805-292-10). Reconnect
present?
circuit 005 (WP 0173).
wires 2,3, and 4.
Measure voltage between blower
YES
motor connector, circuit 005C (O),
harness side, and ground (WP 0175,
AD
Frame 5. HVAC).
CONTINUED