AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM DUCTS DURING AC OPERATIONS - continued

DRAFT

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

AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM

DUCTS DURING AC OPERATIONS - Continued

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WARNING

14.

KNOWN INFO

TEST OPTIONS

Read WARNING on

Power to fan control switch OK.

Voltage test.

page 0012-29.

Blower operates.

Multimeter.

AC condenser core not blocked or damaged.

Are 22 to 28 vdc measured on

REASON FOR QUESTION

AC compressor belts OK.

AC harness wire 1156 at high

If 22 to 28 vdc are not

AC heater/evaporator core not blocked or

pressure switch connector,

measured, AC harness

damaged.

when fan control switch is set

wire 1156 is faulty.

Temperature control switch temperature

to an on position and

probe OK.

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temperature control switch is

AC harness wire 1155 OK.

set to the coldest temperature

AC condenser assembly harness black wire

position?

OK.

AC condenser motor solenoid OK.

AC condenser motor red wire OK.

AC condenser motor ground wire OK.

AC condenser motor OK.

Repair AC harness

wire 1156 (see

AC condenser assembly harness green wire

Appendix A) or

OK.

replace AC wiring

AC condenser motor solenoid ground wire

harness (WP 0048).

OK.

Verify repair, go to

Fan control switch OK.

Step 29 of this fault.

YES

Wire 1156 OK.

Temperature control switch OK.

Heater cable OK.

AC cable OK.

Defrost cable OK.

AC harness wire 1435 OK.

AC compressor clutch OK.

AC harness wire 1154 OK.

Low pressure switch OK.

POSSIBLE PROBLEMS

AC harness wire 1156 faulty.

AC harness wire 1158 faulty.

High pressure switch faulty.

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0012-28