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 161 (POWER SEATS)COMPONENT TESTSPOWER SEAT CONTROL SWITCHPOWER & GROUND CIRCUIT TESTS
2004 Toyota Celica GT, Standard
Power & Ground Circuit Tests
2004 Toyota Celica GT, StandardSECTION Power & Ground Circuit Tests
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 seat. See POWER SEAT under REMOVAL & INSTALLATION. Disconnect 10-pin electrical harness connector from power seat control switch. Remove power seat control switch.
- Check continuity of ground circuit by connecting positive lead of DVOM to power seat control switch 10-pin electrical harness connector terminal No. 4 (White/Black wire) and negative lead of DVOM to good body ground point. If resistance is greater than one ohm, repair ground circuit between power seat control switch and ground point. If ground circuit is okay, go to next step. Ground point for driver seat with driving position memory is located in engine compartment on left front inner quarter panel. Ground point for driver seat without driving position memory is located at left front corner of luggage compartment (trunk). Ground point for passenger seat with driving position memory is located in engine compartment on right front inner quarter panel. Ground point for passenger seat without driving position memory is located at right front corner of luggage compartment (trunk). See MEMORY SYSTEMS and POWER SEATS in SYSTEM WIRING DIAGRAMS article.
- On all except driver seat with driving position memory, check power feed circuit by connecting positive lead of DVOM to power seat control switch 10-pin electrical harness connector terminal No. 1 (Blue/Orange wire) and negative lead of DVOM to good body ground point. If 10-14 volts is not present, repair power feed circuit between power seat control switch and battery. See MEMORY SYSTEMS and POWER SEATS in SYSTEM WIRING DIAGRAMS article.
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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.