Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 130 (BODY CONTROL SYSTEMS)COMPONENT TESTSTAILLIGHT CONTROL RELAY
2004 Toyota Celica GT, Standard
Taillight Control Relay
2004 Toyota Celica GT, StandardSECTION Taillight Control Relay
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Taillight control relay may also be referred to as tail relay or taillight relay.
- Turn ignition off. Remove taillight control relay. Taillight control relay is located in driver side junction block. See Figure.
- 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.
- 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.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.