Blower Motor Switch Replacement; Fuse R E P La Ce M E N; Ccot A/C System-G S E Rie; Condenser R E P Lace M E N - GMC 1986 P-Truck Service Manual

• Use new seals (o-rings) coated with clean
rerfrigeration oil.
4. Sensing bulb to the evaporator outlet line (342).
• Bulb must make good contact with the line.
• Add 30 ml (3 ounces) of clean refrigeration
oil to new core.
5. Upper case and supports to the core.
6. Lower core case and blower assembly.
7. Blower-evaporator assembly to the roof.
8. Support to roof rail screws.
9. Refrigerant lines to the blower-evaporator unit.
• Use new se als (o -rin g s ) w ith clean
refrigeration oil.
10. Blower lead wire.
11. Ground wire.
12. Rear duct.
13. Battery ground cable.
14. Evacuate, charge and check the system.
BLOWER MOTOR SWITCH
REPLACEMENT
The three-speed (LO-MED-HI) blower motor switch is
located in the instrument panel to the left of the ash
tray.
CCOT A/C SYSTEM — G SERIES
CONDENSER REPLACEMENT
Remove or Disconnect (Figure 53)
1. Battery ground cable.
2. Purge the system of refrigerant.
3. Grille, hood lock, and center hood lock support.
4. Condenser inlet and outlet lines at the condenser
(70).
5. Screws attaching the left side condenser bracket
to the radiator.
6. Screws attaching the right side condenser
bracket to the condenser.
7. Condenser.
8. Left bracket from the condenser.
Install or Connect (Figure 53)
1. Left bracket to condenser.
2. Condenser (70).
• Add 30 ml (1 ounce) of clean refrigeration oil
to a new condenser.
3. Screws attaching the left side of the condenser
bracket to the condenser.
4. Screws attaching the right side of the condenser
bracket to the condenser.
AIR CONDITIONING
«--► Remove or Disconnect
Battery ground cable.
Switch retaining screws.
Wiring harness.
Switch.
4 Install or Connect
+ -
1. Switch.
2. Wiring harness.
3. Switch retaining screws.
4. Battery ground cable.
FUSE REPLACEMENT
A-25 amp fuse at the junction box protects this
system. A 20-amp fuse, located between the junction
block and the rear blower motor switch, protects the
rear blower high speed circuit.
5. Condenser inlet and outlet lines at the condenser
(70).
6. Grille, hood lock and center hood lock support.
7. Refrigerant.
8. Evacuate, charge and test the system.
ACCUMULATOR
REPLACEMENT
Remove or Disconnect (Figure 53 and 54)
1. Battery ground cable.
2. Compressor clutch cable.
3. Discharge the system.
4. Inlet and outlet lines.
Important
• Cap or plug open connections.
5. Bracket screws.
6. Accumulator.
1B-49