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.
1990 Geo Storm GSi, StandardFACTORY OEM SERVICE PROCEDURE
Shift Indicator Light (Metro M/T Models)
- Turn ignition on and note shift indicator light. If light is off, proceed to step 3). If light is on, proceed to step 2).
- Turn ignition off. Disconnect ECM, located under left side of dash. Turn ignition on and note shift light. If light is off, ECM is faulty. If light is on, check for short to ground in Light Blue wire between ECM and shift indicator light.
- Turn ignition off. Disconnect ECM. The ECM is located under left side of dash. Turn ignition on. Install jumper wire between Light Blue wire of ECM connector and ground.
- If light is on, check for defective connection at ECM or for faulty ECM. If light is off, check for defective bulb, open in power supply circuit to shift light, or open in Light Blue wire from light to ECM.
Factory Service Tools
Use the Manual With the Right Hardware
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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.