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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20.

WARNING

KNOWN INFO

TEST OPTIONS

Read WARNING on

Power to fan control switch OK.

page 0012-41.

Voltage test.

Blower operates.

Multimeter.

AC condenser core not blocked or damaged.

REASON FOR QUESTION

Are 22 to 28 vdc measured on

AC compressor belts OK.

AC harness wire 1155 at AC

AC heater/evaporator core not blocked or

If 22 to 28 vdc are measured,

damaged.

condenser assembly

AC condenser assembly

harness black wire is

connector?

AC temperature control switch temperature

faulty. If not, AC harness

probe OK.

wire 1155 is faulty.

Heater cable OK.

AC cable OK.

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Defrost cable OK.

AC compressor clutch OK.

Repair AC harness

wire 1155 (see

AC harness wire 1154 OK.

Appendix A) or

Low pressure switch OK.

replace AC wiring

AC harness wire 1158 OK.

harness (WP 0046).

Verify repair, go to

High pressure switch OK.

Step 27 of this fault.

AC harness wire 1156 OK.

YES

AC condenser assembly harness green wire

OK.

AC condenser motor solenoid ground wire

Repair AC condenser

OK.

assembly harness black wire

Fan control switch OK.

(see Appendix A). Verify

repair, go to Step 27 of this

Wire 1156 OK.

fault.

AC temperature control switch OK.

AC condenser motor solenoid OK.

AC condenser motor power wire OK.

AC condenser motor ground wire OK.

AC condenser motor OK.

POSSIBLE PROBLEMS

AC condenser assembly harness black wire

faulty.

AC harness wire 1155 faulty.

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0012-40