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Taillight Control Relay

NOTE: Taillight control relay may also be referred to as tail relay or taillight relay.
  1. Turn ignition off. Remove taillight control relay. Taillight control relay is located in driver side junction block. See Figure.
  2. Note identification of electrical terminals on taillight control relay. See Fig 1. Using an ohmmeter, check that no continuity exists between terminals No. 3 and 5 on taillight control relay. Check that continuity exists between terminals No. 1 and 2 on taillight control relay.
  3. Using jumper wires, apply battery voltage and ground to terminals No. 1 and 2 on taillight control relay. Check that continuity now exists between terminals No. 3 and 5 on taillight control relay. See Fig 1. If continuity is not as specified, replace taillight control relay if defective.
    Fig 1: Identifying Electrical Terminals On Taillight Control Relay
    G00018627Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002