AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE

DRAFT

TB 9-2320-364-13&P-1

0010

AC HEATER/EVAPORATOR BLOWER DOES NOT OPERATE

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

INITIAL SETUP:

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Maintenance Level

Materials/Parts

Field Level Maintenance

None

Equipment Condition

Personnel Required

Shut off engine (TM 9-2320-364-10).

One

Parking brake applied (TM 9-2320-364-10).

References

Wheels chocked (TM 9-2320-364-10).

TM 9-2320-364-10

Tools and Special Tools

TM 9-2320-364-20

Tool Kit, General Mechanic's (Item 9, Appendix F)

Multimeter (Item 2, Appendix F)

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

START

WARNING

KNOWN INFO

TEST OPTIONS

Read WARNING on

CTIS operates indicating 24 vdc power OK.

Voltage test.

page 0010-3.

Multimeter.

POSSIBLE PROBLEMS

REASON FOR QUESTION

AC circuit breaker faulty.

Are 22 to 28 vdc measured on

Wire 1280A faulty.

If 22 to 28 vdc are not

AC circuit breaker, terminal

measured, AC heater/

wire 1082, when engine start

Wire 1082 faulty.

evaporator blower will not

switch is in the ON position?

Fan control switch faulty.

operate.

Fan control switch harness connector loose

or faulty.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

AC heater/evaporator blower motor resistor

harness connector loose or faulty.

AC heater/evaporator blower motor power

Go to Step 7 of this

wire faulty.

fault.

AC heater/evaporator blower motor faulty.

AC heater/evaporator blower motor ground

wire faulty.

YES

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

(0010-1 blank)/0010-2