Where is the fuel pump relay on a 1992 Chevy Blazer?

In a 1992 Chevy Blazer, the fuel pump relay is typically located in the engine bay's under-hood power distribution center (the fuse/relay box). Look for a relay labeled FUEL PUMP on the lid diagram. This is the quickest way to access the circuit.

Where to look in the engine bay

Most 1992 Blazers use the engine-compartment fuse/relay center. With the hood open, inspect the rectangular box mounted on or near the driver-side inner fender, firewall, or radiator support. Remove the lid and read the diagram to confirm which relay is the fuel pump.

Alternative locations by model and engine

On some GMT400 Blazers or with certain engines, the fuel pump relay may be in a secondary fuse box under the dash inside the passenger compartment. If you don’t see a FUEL PUMP label in the under-hood box, check the interior fuse panel as well as the wiring to the fuel pump connector.

To locate the relay in the engine bay, follow these steps:

• Open the hood and locate the under-hood fuse/relay center (a rectangular plastic box with a removable lid).


• Remove the lid and consult the diagram to identify the FUEL PUMP relay location.


• Note the relay's physical position in the box (usually a small rectangular module with four blade terminals).


• If the box lacks a clearly labeled FUEL PUMP, compare against the diagram or refer to the vehicle’s service manual for the exact relay position for your engine (4.3L V6 or 5.7L V8).


• If not found in the engine bay, inspect the interior fuse block under the dashboard for the fuel pump circuit and test from there.

Locating the correct relay is essential before testing or replacing. The typical under-hood location is the most common starting point, and many owners will find the FUEL PUMP relay labeled on the PDC lid.

Testing and replacing the fuel pump relay

If you’ve confirmed the relay is in the engine bay but the fuel pump won’t run, you can test or swap with a known-good relay to verify functionality.

• Power off, then remove the suspected FUEL PUMP relay from the block and inspect for corrosion or damage; replace if needed.


• Swap the FUEL PUMP relay with another identical 4-pin relay (such as the cooling fan or horn relay) to see if the symptom moves with the relay.


• With ignition ON, use a multimeter or test light to verify 12V is present at the relay’s input terminal and that the relay’s output to the fuel pump connector receives voltage when the relay should be energized.


• Check the ground connection for the fuel pump circuit at the pump connector; a bad ground can mimic a bad relay.


• If swapping the relay fixes the condition, install a new relay. If not, the problem may lie with the pump, wiring, or ECU/fuel pump circuit control.

Testing and replacement should be done with caution; if you’re unsure, consult a mechanic or service manual for your exact Blazer engine (4.3L V6 or 5.7L V8) to confirm pin numbers and wiring.

Summary

For a 1992 Chevy Blazer, start with the under-hood power distribution center, where the FUEL PUMP relay is typically located and labeled on the lid. If not found there, check the interior fuse block as a backup. Testing involves swapping with a known-good relay and verifying voltage to the pump. If issues persist, inspect the pump, wiring, and grounds, and consult the service manual for engine-specific wiring diagrams.

Where is the fuel pump relay on a 1992 Chevy?

The fuel pump relay in your 1992 Chevy Silverado/GMC Sierra 1500 is located inside the cab, underneath the dashboard, directly behind the brake pedal bracket and mounted on the steering column support brace. It sits within a small relay cavity alongside other similar-looking relays near the fuse block.

Where is the fuel pump relay located?

The fuel pump relay is most commonly located in the fuse/relay box under the hood, though older cars may have it behind the dashboard or under the driver's side kick panel. The exact location varies by vehicle, so your best bet is to consult your owner's manual or search online for your specific make and model.
 
This video shows how to locate the fuel pump relay in a car: 21sPhillips VisionYouTube · Jan 3, 2022
Common locations

• Under the hood: Look for a black plastic box, often near the battery, that contains fuses and relays. A diagram on the lid will identify each component. 
• Under the dashboard: Some vehicles, especially older ones, may have the relay behind the instrument panel or under the driver's side of the dashboard. 
• Driver's side kick panel: In many cases, you can find the relay behind a plastic cover on the driver's side, near where your feet would be. 

This video shows how to find the fuel pump relay in a car: 56sCarsNToysYouTube · Jan 28, 2016
Tips for finding it

• Consult your owner's manual: It will have a diagram showing the precise location of the relay. 
• Search online: Type your vehicle's year, make, and model with "fuel pump relay location" to find specific diagrams and videos. 
• Look for the diagram: Most fuse boxes have a diagram on the inside of the lid that will point out the fuel pump relay. 

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 92 S10 Blazer?

1992 Chevy S10 Fuel Pump Relay Location (And Exactly How To Access, Test, and Replace It) The fuel pump relay on a 1992 Chevrolet S10 pickup is located under the hood, inside the main relay center mounted on the driver's side front fender well, near the brake master cylinder.