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Home › Lexus › 1993 › SC 400 › Repair and Diagnosis › Engine Performance › System › Engine Controls - System/Component Tests › Miscellaneous Controls › Cooling Fan › Cooling Fan Relay No. 1 & 2 (LS400)

Cooling Fan Relay No. 1 & 2 (LS400)

  1. Disconnect cooling fan relay No. 1. See Figure. If cooling fan relay No. 1 tests okay, disconnect cooling fan relay No. 2.
  2. Use an ohmmeter to check for continuity between relay terminals No. 1 and 2. See Figure-29. Check for continuity between relay terminals No. 3 and 4. If no continuity exists, replace cooling fan relay.
  3. Apply battery voltage between relay terminals No. 1 and 2. Using an ohmmeter, ensure continuity is not present between relay terminals No. 3 and 4. If continuity is present, replace relay.
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