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.
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HOMESERVICE MANUALSMAZDA1991RX-7 BASE, 2D CONVERTIBLE, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2 (ENGINE CONTROLS - BASIC TESTING)RESISTOR RELAY (RX7 ONLY)
1991 Mazda RX-7 Base, 2D Convertible, Standard
Resistor Relay (RX7 Only)
1991 Mazda RX-7 Base, 2D Convertible, StandardSECTION Resistor Relay (RX7 Only)
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1990 Mazda RX-7, 1990 Mazda Protege, 1990 Mazda MX-6, 1990 Mazda MX-5 Miata, and 1990 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
- Remove air cleaner and airflow meter. Disconnect fuel pump resistor. Ensure continuity exists between terminals "a" and "b". See Fig 1 and Fig 2 .
- Measure resistance between the following terminals. Resistance between terminals "c" and "d" should be 60-92 ohms and between "e" and "f" should be .70-.94 ohms. If resistor relay does not test as specified, replace relay.
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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.