Expansion Tube ( O R I F I C; A/C Module Wiring Harness - Pontiac Fiero 1988 Service Manual

1B-28 AIR CONDITIONING
F * | Install or Connect
1. Lube new O-ring (525 viscosity refrigerant oil).
2. Switch and O-ring. (See Section ID.)
3. Retaining ring.
4. Rear compressor mounting bracket.
5. Lower vehicle.
6. Negative ( —) battery cable.
7. Evacuate and charge system.
LOW P R E S S U R E C U T O F F SWITCH
r * i Remove or Disconnect
1. Negative ( —) battery cable.
2. Discharge system.
3. Raise vehicle.
4. Rear compressor mounting bracket.
5. Retaining ring. (See Section ID.)
6. Switch.
7. Discard O-ring
Install or Connect
1. Lube new O-ring (525 viscosity refrigerant oil).
2. Switch and O-ring. (See Section ID.)
3. Retaining ring.
4. Rear compressor mounting bracket.
5. Lower vehicle.
6. Negative ( - ) battery cable.
7. Evacuate and charge system.
EXPANSION T U B E (Orifice)
F + 1 Remove or Disconnect
Discharge system.
1.
2.
3.
1.
2.
3.
Nut at lower line of evaporator.
Expansion tube.
Install or Connect
Expansion tube (small screen first).
New O-ring (lubricate with 525 viscosity refrig-
erant oil).
Nut at right side of evaporator.
Tighten
Torque liquid line to 41 N
#
m (30 ft. lbs.).
Evacuate and charge system.
U Important
In the event that difficulty is encountered
during the removal of a plugged or
restricted expansion tube use the follow-
ing procedure.
|<"»1 Remove or Disconnect
1 Impacted residue.
2. Pressure switch.
|T] Important
Carefully apply heat with heat gun or
equivalent approximately 1/4 inch from
dimples on inlet pipe. Do not over heat.
F"+| Remove or Disconnect
1. Orifice tube while applying heat.
Clean
B
i.
3.
4.
5.
A/C
•
1.
2.
3.
4.
B
1.
2.
3.
4.
Swab inside of evaporator inlet pipe with
R-ll or equivalent solvent.
Install or Connect
One ounce of 525 viscosity refrigerant oil to
system.
Lubricate new orifice tube and refrigerant line
O-ring with 525 viscosity refrigerant oil.
Orifice tube (smaller screen first).
Liquid coolant line.
Tighten
Torque liquid line to 41 N»m (30 ft. lbs.).
Evacuate and charge system.
MODULE WIRING HARNESS
Remove or Disconnect
Negative ( - ) battery cable.
All electrical connections at A/C module and
windshield wiper motor.
Wiring harness at bulk head connector.
Harness assembly.
Install or Connect
Harness assembly.
All electrical connections at A/C module and
wiper motor.
Wiring harness at bulk head connector.
Negative ( —) battery cable.
A/C CONTROLLER A S S E M B L Y
1 * * 1 Remove or Disconnect
1. Negative ( —) battery cable.
2. Four bolts at trim plate assembly.
3. Trim plate assembly.
4. Three bolts at controller.
5. Controller.