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

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

25.

WARNING

KNOWN INFO

TEST OPTIONS

Read WARNING on

Power to fan control switch OK.

page 0012-51.

Continuity test.

Blower operates.

Multimeter.

AC condenser core not blocked or damaged.

REASON FOR QUESTION

Is continuity measured

AC compressor belts OK.

across wire 1156 from fan

AC heater/evaporator core not blocked or

If continuity is not measured,

damaged.

control switch to temperature

wire 1156 is faulty.

control switch?

AC temperature control switch temperature

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

probe OK.

Heater cable OK.

AC cable OK.

Defrost cable OK.

AC compressor clutch OK.

AC harness wire 1154 OK.

Low pressure switch OK.

AC harness wire 1158 OK.

Repair wire 1156

(see Appendix A) or

High pressure switch OK.

replace wire 1156

AC condenser motor power wire OK.

(WP 0048). Verify

AC condenser motor ground wire OK.

repair, go to Step 27

of this fault.

AC condenser motor OK.

YES

AC condenser assembly harness black wire

OK.

AC harness wire 1155 OK.

AC condenser assembly harness green wire

OK.

AC condenser motor solenoid OK.

AC condenser motor solenoid ground wire

OK.

Fan control switch OK.

POSSIBLE PROBLEMS

Wire 1156 faulty.

AC harness wire 1156 faulty.

AC temperature control switch faulty.

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

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

0012-50