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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10.

WARNING

KNOWN INFO

Read WARNING on

Power to fan control switch OK.

TEST OPTIONS

page 0012-21.

Blower operates.

Voltage test.

AC condenser core not blocked or damaged.

Are 22 to 28 vdc measured on

Multimeter.

AC compressor belts OK.

AC harness wire 1154 at AC

REASON FOR QUESTION

AC condenser motor solenoid OK.

compressor clutch connector,

If 22 to 28 vdc are measured,

AC condenser motor power wire OK.

when fan control switch is set

AC compressor clutch is

to an on position and

AC condenser motor ground wire OK.

faulty.

temperature control switch is

AC condenser motor OK.

set to the coldest temperature

AC condenser assembly harness black wire

position?

OK.

AC harness wire 1155 OK.

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AC condenser assembly harness green wire

OK.

AC condenser motor solenoid ground wire

Connect AC harness

OK.

wire 1154 connector

Fan control switch OK.

to AC compressor

clutch connector, and

Wire 1156 OK.

go to Step 11 of this

AC temperature control switch OK.

fault.

AC heater/evaporator core not blocked or

damaged.

YES

AC temperature control switch temperature

probe OK.

Recover R-134a refrigerant

(WP 0050). Replace AC

Heater cable OK.

compressor (WP 0023) and

AC cable OK.

AC condenser dryer

Defrost cable OK.

(WP 0025). Evacuate and

charge system (WP 0050).

POSSIBLE PROBLEMS

Verify repair, go to Step 27

of this fault.

AC compressor clutch faulty.

AC harness wire 1154 faulty.

Low pressure switch faulty.

AC harness wire 1156 faulty.

AC harness wire 1158 faulty.

High pressure switch faulty.

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0012-20