Where is the relay on a 1995 Chevy Blazer?
The fuel pump relay, which is the relay most people need to check on a no‑start or fuel‑delivery issue, is located in the under‑hood fuse/relay box in the engine bay on the driver’s side. The exact position is shown on the diagram inside the box cover.
In 1995, the Blazer uses two main electrical centers: an engine‑bay fuse/relay box and an interior fuse box. While the fuel pump relay is typically found in the engine‑bay block, other relays for cooling fans, ignition and accessories may be housed in the same box. If you’re troubleshooting, start with the engine‑bay relay block and confirm you’ve identified the correct relay by consulting the diagram on the cover.
Locating the engine‑bay relay block
Use the steps below to locate the under‑hood fuse/relay box and identify the fuel pump relay by its label and position.
What the fuel pump relay looks like
The fuel pump relay is a small rectangular module with 4 or 5 pins. In the engine‑bay block, it is usually labeled FUEL PUMP (or PUMP) on the diagram inside the cover and sits among other relays.
- Open the hood and find the large rectangular plastic fuse/relay box in the engine bay, typically on the driver’s side near the firewall or fender.
- Remove the cover and read the diagram on the underside to locate the FUEL PUMP relay.
- Note the relay’s position (row/slot) so you can verify or swap it later.
- If needed for diagnosis, swap the fuel pump relay with another identical 4‑ or 5‑pin relay from the same box to test whether the problem follows the relay.
- When finished, replace the cover securely to protect the fuses and relays from dirt and moisture.
Using the diagram on the engine‑bay block cover is essential, as GM may vary relay layouts between production runs and model years.
Interior fuse box and other relays
Besides the engine‑bay block, the Blazer also has an interior fuse box (commonly located on the passenger side kick panel) that houses fuses and some relays for interior systems. The fuel pump relay is normally not located here, but understanding the interior box can help with broader electrical troubleshooting.
What to check inside
Consult the cover diagram for the interior box to identify relays related to HVAC, lighting, or other accessories. Only swap relays with identical types if you’re troubleshooting a non‑critical circuit, and always reinstall the cover securely.
- Open the interior fuse box and inspect the labels on the relays as shown by the cover diagram.
- If you’re diagnosing a non‑fuel issue, you may swap identical relays to see if symptoms move with the relay.
For fuel delivery problems, focus your attention on the engine‑bay fuel pump relay first, then expand to the interior box if necessary.
Diagnostics and safety tips
When working with electrical components, disconnect the battery or use proper safety precautions to avoid short circuits. If you’re unsure about testing, you can swap the suspected relay with a known good one of identical type to see if the issue changes. If the problem persists after checking or replacing the relay, other causes may include wiring, the fuel pump itself, or the engine control module.
Summary
On a 1995 Chevy Blazer, the relay you’re most likely looking for is the fuel pump relay, and it sits in the engine‑bay under‑hood fuse/relay box. Check the box diagram for the exact position and label, and use careful testing (or swapping with an identical relay) to confirm whether the relay is at fault. Remember that there is also an interior fuse box for other systems, but the fuel pump relay is typically located in the engine bay.
What are the symptoms of a failing fuel pump relay?
Symptoms of a bad fuel pump relay include an engine that cranks but won't start, sudden or intermittent stalling, a loss of power while driving, and a rough idle. You may also notice the fuel pump doesn't make its usual humming sound when you turn the key, and the check engine light might illuminate. Other signs are engine misfires and hesitation during acceleration.
Primary symptoms
- Engine won't start or cranks but doesn't start: The engine turns over but doesn't ignite because the relay is preventing fuel from reaching the engine.
- Stalling: The vehicle may stall suddenly while driving or after starting, especially if the relay fails intermittently.
- No fuel pump noise: When you turn the ignition to the "on" position, you won't hear the normal soft whirring sound from the fuel pump as it builds pressure.
Other common symptoms
- Loss of power: You may experience a loss of power, particularly during heavy acceleration or when going uphill.
- Rough idle: The engine may idle roughly or sputter due to an inconsistent fuel supply.
- Engine misfires: The engine may misfire, feeling like a hesitation or stumble, because some cylinders aren't getting enough fuel.
- Check Engine Light: The check engine light may come on as the car's computer detects a problem with fuel delivery.
- Intermittent starting problems: The car may start fine some days and be difficult to start on others, with the problem getting progressively worse over time.
- Unexplained battery drain: A faulty relay that gets stuck in the "on" position can cause the fuel pump to run continuously, leading to a dead battery.
Where is the fuel pump relay on a 1995 Chevy Blazer?
The primary fuse and relay center under your Blazer's hood is the home of the fuel pump relay. Locate it on the driver's side of the engine compartment. It's a rectangular black plastic box, typically mounted near the brake master cylinder and against the firewall.
Where is the horn relay on a 1995 Blazer?
1995 Blazer Horn Relay Location and Troubleshooting
Blazer horn issues often include relay failure and wiring corrosion causing intermittent or no sound. The horn relay in a 1995 Blazer is typically located in the fuse box under the hood.
Where is the flasher relay on a 1995 Chevy Blazer?
For the 1995 Chevy S-10 Blazer, the turn signal flasher is typically located under the dash, right of the steering column. If missing, check near the fuse box or steering column bracket.
