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 MANUALSCHEVROLET1989STEP VAN P30, 4.8 T, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALCOMPONENT LOCATIONSELECTRICAL COMPONENT LOCATORCIRCUIT PROTECTION DEVICES
1989 Chevrolet Step Van P30, 4.8 T, Standard
Circuit Protection Devices
1989 Chevrolet Step Van P30, 4.8 T, StandardSECTION Circuit Protection Devices
CIRCUIT PROTECTION DEVICES LOCATION
| Component | Location | |
|---|---|---|
| Battery Junction Block (1989 ONLY) | On left side of firewall. | |
| Circuit Breakers | ||
| Headlight/Parking Light | In headlight switch. | |
| Power Door Lock | On fuse block. | |
| Power Window | On fuse block. | |
| Rear A/C | On firewall. | |
| Convenience Center | Under left side of dash. | |
| Fuse Block | ||
| 4.3L | Under left side of dash. See Figure. | |
| 5.0L & 5.7L - 1989 | Under left side of dash. See Figure. | |
| 5.0L & 5.7L - 1990 | Under left side of dash. See Figure. | |
| 7.4L - 1989 | Under left side of dash. See Figure. | |
| 7.4L - 1990 | Under left side of dash. See Figure. | |
| Fusible Links | ||
| A/C-Heater (Red) | At battery junction block (rear unit). | |
| Alternator (Rust) | At battery junction block. | |
| Auxiliary Cooling Fan Relay (Rust) | At battery junction block. | |
| Glow Plug Controller (Rust) (Diesel) | At starter solenoid. | |
| Ignition Switch (Rust) | At battery junction block (2 links). | |
| Power Accessories (Rust) | At battery junction block. | |
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.