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Blue/Red Wire (ECT Switch "A")

  1. Connect a jumper wire between ground and Blue/Red wire terminal. If both cooling fans do not come on, check for open Blue/Red wire between radiator fan control module and both relays (radiator fan relay or condenser fan relay).
  2. If Blue/Red wire is okay, check for open Yellow/White wire between module and condenser fan relay, or open Yellow wire between module and radiator fan relay. If Yellow/White and Yellow wires are okay, check for faulty radiator fan relay or condenser fan relay. See RELAYS TEST  under TESTING.
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