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 TESTSHORN RELAY
2004 Toyota Celica GT, Standard
Horn Relay
2004 Toyota Celica GT, StandardSECTION Horn 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.
- Turn ignition off. Remove horn relay. Horn relay is located in engine compartment junction block at left side of engine compartment, in front of shock tower.
- Note identification of electrical terminals on horn relay. See Fig 1. Using ohmmeter, check that continuity exists between terminals No. 1 and 2 on horn relay and that no continuity exists between terminals No. 3 and 5 on horn relay.
- Using jumper wires, apply battery voltage and ground to terminals No. 1 and 2 on horn relay. Check that continuity now exists between terminals No. 3 and 5 on horn relay. See Fig 1. If continuity is not as specified, replace horn relay.
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.