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.
Main Relay (Computer/Fuel System): Testing and Inspection
1995 Mazda B4000 2WD V6-4.0L OHVSECTION Testing and Inspection
INSPECTION
1. Remove the PCM power relay from the main fuse block.
2. Apply battery voltage (B+) and check continuity between terminals of the relay.
3. If not as specified, replace the PCM power relay.
1. Remove the PCM power relay from the main fuse block.
2. Apply battery voltage (B+) and check continuity between terminals of the relay.
3. If not as specified, replace the PCM power relay.
RENDER: 1.0x
NO RELATED
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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.