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.
1989 Geo Prizm Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Lock-Up Relay (Tracker A/T)
- Turn ignition off. Locate lock-up relay at right rear corner of engine compartment, in front of battery. Disconnect lock-up relay connector. Using an ohmmeter, check continuity between Light Green/Red wire terminal of relay and White/Yellow wire terminal of relay. If continuity does not exist, replace relay.
- Apply battery voltage to Light Green/Red wire terminal of relay. Apply ground to White/Yellow wire terminal of relay. Using an ohmmeter, check continuity between White and White/Red wire terminals of relay. If continuity does not exist, replace relay. Continuity should only exist while relay is energized.
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.