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Home >> Lexus >> 2001 >> LX 470 >> Repair and Diagnosis >> External Pages >> Different car >> Section 187 (Body Control System) >> Circuit Tests >> Taillight Relay Circuit >> Circuit Inspection
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Circuit Inspection

WARNING: This page is about a different car, the 2002 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

The taillight relay will be ON by operating the taillight switch. The transistor which activates the taillight relay has 2 types:

  1. One activates directly by the headlight switch for fail safe operation.
  2. Another activates by the body ECU.
See Fig 1.

Fig 1: Identifying Taillight Relay Circuit
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