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.
1993 Geo Storm Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Ignition Switch Test
- Using test light, backprobe White/Black wire terminal of ignition switch 8-terminal connector. Connector is located on steering column, near ignition switch. Test light should glow.
- If test light does not glow, check main and key fuses. Check for open in White/Black wiring circuit to ignition switch. See appropriate chassis wiring diagram in WIRING DIAGRAMS article.
- Turn ignition switch to START position. Using a test light, backprobe Black/White wire terminal (at ignition switch 8-terminal connector) to starter circuit and Black/Yellow wire terminal to ignition power circuit. Test light should glow. If test light does not glow at either terminal, replace ignition switch.
Factory Service Tools
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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.
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