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.
1997 Lexus ES 300FACTORY OEM SERVICE PROCEDURE
Power Main Relay Test
Remove relay. See ELECTRICAL COMPONENT LOCATIONS table. Replace relay if it does not operate as follows. See Fig 1.
- No continuity should exist between terminals No. 3 and 5.
- Apply battery voltage and ground between terminals No. 1 and 2. Continuity should exist between terminals No. 3 and 5.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.