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 Tracker Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Rectifier Test
- Using an ohmmeter, check for continuity between each upper and lower rectifier bodies and each diode leads. Perform STEP 1. See Fig 1. Check for continuity in both directions by reversing ohmmeter leads. Continuity should only exist in one direction. If continuity exists in both directions or neither direction, replace rectifier.
- Using an ohmmeter, check continuity between diode trio leads. Perform STEP 2. See Fig 1. Continuity should only exist in one direction.
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.