LS 400 V8-4.0L (1UZ-FE) (1990)
Radiator Cooling Fan Motor Relay: Testing and Inspection
No. 3 Cooling Fan & Engine Main Relay
Fig. 1 Cooling fan component locations
When performing the following tests, refer to Fig. 1.
1.
Using an ohmmeter, perform the following checks:
a. Continuity should exist between terminals 1 and 3.
b. Continuity should exist between terminals 2 and 4.
c. Continuity should not exist between terminals 4 and 5.
2.
Apply battery voltage across terminals 1 and 3. Perform the following checks, using an ohmmeter:
a. Continuity should exist between terminals 4 and 5.
b. Continuity should not exist between terminals 2 and 4.
3.
If the checks were not as specified in steps 1 and 2, replace relay.