AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM DUCTS DURING AC OPERATIONS (Cont)

DRAFT

TB 9-2320-279-13-1

AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM

DUCTS DURING AC OPERATIONS - Continued

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26.

WARNING

KNOWN INFO

TEST OPTIONS

Read WARNING on

Power to fan control switch OK.

page 0012-53.

Continuity test.

Blower operates.

Multimeter.

AC condenser core not blocked or damaged.

REASON FOR QUESTION

Is continuity measured

AC compressor belts OK.

across temperature control

AC heater/evaporator core not blocked or

If continuity is measured, AC

damaged.

switch when switch is set to

harness wire 1156 is

faulty. If not, temperature

the coldest position?

AC temperature control switch temperature

control switch is faulty.

probe OK.

Heater cable OK.

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AC cable OK.

Defrost cable OK.

AC compressor clutch OK.

Replace temperature

AC harness wire 1154 OK.

control switch

Low pressure switch OK.

(WP 0044). Verify

repair, go to Step 27

AC harness wire 1158 OK.

of this fault.

High pressure switch OK.

AC condenser motor power wire OK.

YES

AC condenser motor ground wire OK.

AC condenser motor OK.

Repair AC wire 1156 (see

AC condenser assembly harness black wire

Appendix A) or replace AC

OK.

wiring harness (WP 0046).

AC harness wire 1155 OK.

Verify repair, go to Step 27 of

AC condenser assembly harness green wire

this fault.

OK.

AC condenser motor solenoid OK.

AC condenser motor solenoid ground wire

OK.

Fan control switch OK.

Wire 1156 OK.

POSSIBLE PROBLEMS

AC harness wire 1156 faulty.

AC temperature control switch faulty.

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0012-52