Radiator Cooling Fan Motor: Service and Repair
REMOVE and REPLACE1. Disconnect battery ground cable.
2. Remove grille assembly.
3. Disconnect electrical connector from cooling fan.
4. Remove fan assembly attaching bolts and the fan.
5. Reverse procedure to install.
COOLING FAN MODIFICATIONS (IF APPLICABLE)
Fig. 1 Electric cooling fan installation:
Fig. 2 Electric cooling fan wiring harness installation:
Fig. 3 Electric cooling fan temperature sender installation:
As of January 1, 1985, all C, K, R and V-20/2500-30/3500 models equipped with the V8-454 engine and heavy duty emissions systems are equipped with an auxiliary electric engine cooling fan. Similar 1982---85 truck models not equipped with the fan may have one installed using the following procedure:
1. Disconnect battery ground cable.
2. Remove grille assembly.
3. Drill mounting holes and install fan assembly (part No. 15593566), Fig. 1.
4. Drain cooling system, then install fan relay (part No. 14078902), Fig. 2.
5. Install fan wiring harness (part No. 12064526), Fig. 2. Secure harness to fender and radiator support away from sharp edges.
6. Install temperature sender (part No. 14080661) in right cylinder head, Fig. 3.
Fig. 4 Electric cooling fan wiring harness routing:
Fig. 5 Electric cooling fan wiring circuit:
7. Route and secure fan wiring harness as shown in Figs. 4 and 5.
8. Fill cooling system and connect battery ground cable.
9. Run engine and check for proper fan operation. Fan should be energized when engine temperature reaches approximately 225---240°F. Ensure fan blows air through radiator. If fan blows in opposite direction, reverse wires in fan electrical connector at motor.