1992 Camaro Fuel Pump Relay: Location, Testing, and Replacement Guide
If your 1992 Camaro cranks but won’t start, the fuel pump relay is a common culprit that controls power to the fuel pump. The fuel pump relay on a 1992 Camaro is typically located in the under-hood fuse/relay box, often near the battery or on the driver’s side fender, though some models may have it behind the driver’s side kick panel . Before you assume the fuel pump itself has failed, checking the relay is a quick and inexpensive step that can save you hundreds of dollars in unnecessary repairs. This guide will walk you through finding the relay, testing it, bypassing it for diagnostics, and replacing it if needed.
Understanding the Fuel Pump Relay’s Role
The fuel pump relay is an electromechanical switch that allows the powertrain control module (PCM) to control the flow of electrical current to the fuel pump . When you turn the ignition key to the “ON” position, the PCM energizes the relay, which closes its internal contacts and completes the circuit to the fuel pump. This is why you typically hear a brief humming sound from the rear of the car for about two seconds when you turn the key—that’s the fuel pump pressurizing the fuel system .
If the relay fails, the fuel pump receives no power, and your engine won’t start even if the pump itself is in perfect condition. The relay is a small plastic cube, approximately 2 by 2 by 1 inches in size, with four pins that plug into a matching receptacle . It’s designed to handle the high current draw of the fuel pump while allowing the PCM to control it with a low-current signal.
Where Is the Fuel Pump Relay on a 1992 Camaro?
The location of the fuel pump relay depends on the specific engine and trim level of your 1992 Camaro. There are two common locations:
Under-hood relay center – On most models, the fuel pump relay is located in the black plastic relay center under the hood. This box is typically on the right side of the engine compartment, behind the driver’s side headlamp . Remove the cover and look at the diagram printed on the inside of the lid—it will show which relay is for the fuel pump. For 1990-1992 Camaro models with the 305 TPI or 350 TPI engines, the fuel pump relay is located in this under-hood box .
Behind the driver’s side kick panel – Some 1992 Camaro models, particularly the Z28 trim, have the fuel pump relay located inside the cabin. You’ll find it under the driver’s side dash, near the fuse panel, often mounted on the floor by your left foot . This location is more common on earlier third-generation Camaros, but it’s worth checking if you don’t find the relay under the hood.
There is also a separate fuel pump fuse that is often overlooked. Many owners have replaced the fuel pump, fuel filter, and relay, only to find that a small fuse in a black box near the battery was the real problem . This fuse is connected by an orange wire and is directly related to the ECM/fuel pump/oil sending unit circuit. If this fuse is blown, the service engine soon (SES) light may not come on when you turn the key, and the car will not start because the fuel pump has no power .
How to Test the Fuel Pump Relay
Before replacing the relay, you should test it to confirm it’s the problem. Here are the steps to test the fuel pump relay on your 1992 Camaro:
1. Listen for the fuel pump – Turn the ignition key to the “ON” position without cranking the engine. You should hear a brief humming sound from the rear of the car, near the fuel tank. If you hear nothing, the relay or the pump may be faulty .
2. Check for relay clicking – Have someone turn the ignition to the “ON” position while you place your hand on the relay. You should feel a distinct click when the relay energizes. If there’s no click, the relay is not receiving a signal from the PCM, or the relay itself has failed .
3. Swap with a known good relay – The easiest way to test a relay is to swap it with an identical relay from another system, like the fog lamp relay or horn relay. If the fuel pump starts working after swapping, the original relay was bad . Make sure you check the diagram on the fuse box cover to identify which relays are the same type.
4. Use a multimeter – With the ignition in the “ON” position, check for voltage at the relay’s power feed wire (typically pink/black on 1992 Camaro models) . You should see battery voltage (around 12.6 volts). Then, check the dark green/yellow wire, which is the relay-controlled power going to the fuel pump. If there is voltage on the power feed but not on the output wire, the relay is likely faulty .
How to Bypass the Fuel Pump Relay for Diagnostics
If you suspect the relay is bad but want to confirm the fuel pump itself works, you can bypass the relay temporarily. This is a diagnostic procedure only and should not be used as a permanent fix.
Step 1: Locate the fuel pump relay in the under-hood relay center and remove it .
Step 2: Take a 5-inch length of small-diameter copper wire and strip about 1/2 inch of insulation from each end .
Step 3: Look at the 4-pin receptacle where the relay plugs in. Insert one end of the copper wire into the upper-left pin slot and the other end into the lower-right pin slot . Consult the diagram on the relay center cover to confirm the correct pin positions for your specific model.
Step 4: Turn the ignition to the “ON” position. If the fuel pump starts running, the pump and its wiring are good, and the relay is the problem.
Important safety precautions: This bypass provides constant power to the fuel pump, which means it will run continuously even if the engine stalls or you’re in an accident. Only use this method for brief testing, and never drive the vehicle with the relay bypassed . Always use a fused jumper wire to prevent overloading the circuit and reduce the risk of fire .
How to Replace the Fuel Pump Relay
Replacing the fuel pump relay is a straightforward process that takes about five minutes. Here’s what you need to do:
1. Buy the correct replacement relay – For a 1992 Camaro, the OEM fuel pump relay is part number 12065125 (also known as 12135084, 12065118, or 92109510) . This relay fits 1990-1992 Camaro models with 3.1L V6, 5.0L V8, or 5.7L V8 engines. You can also find aftermarket relays at most auto parts stores, but be sure to get the exact match for your vehicle.
2. Remove the old relay – Simply pull the relay straight out of its mounting base. If it’s difficult to grip, you can use a pair of nose pliers, but be careful not to damage the receptacle .
3. Install the new relay – Compare the new relay to the old one to make sure the connecting prongs match. Push the new relay firmly into the receptacle until it sits properly .
4. Test the system – Turn the ignition to the “ON” position and listen for the fuel pump to prime. If you hear the pump run for about two seconds, the replacement was successful.
Common Problems and Troubleshooting
Even after replacing the relay, you may still have issues. Here are some common problems to check:
Blown fuel pump fuse – As mentioned earlier, there is a fuse related to the fuel pump that is often overlooked. It’s located in a small black box connected to the battery by an orange wire, typically mounted on the fender well near the battery . Check this fuse first, as a blown fuse will prevent the fuel pump from receiving power even if the relay is working perfectly.
Bad wiring or connections – Over time, the wiring in the relay socket can corrode or develop loose connections. Inspect the pins in the relay receptacle for corrosion or damage. If you find any issues, you may need to replace the relay connector pigtail. For 1990-1992 Camaro models, the correct replacement connector uses Delphi/Packard terminals and has factory-correct wire colors: orange, red, dark green/white stripe, gray, and black/white stripe .
Faulty PCM or crank position sensor – If the relay is getting power but the PCM is not sending the signal to energize it, the problem could be in the PCM or the crank position sensor. This is more complex and may require professional diagnosis .
Bad fuel pump – If you’ve replaced the relay, checked the fuse, and confirmed the wiring is good, but the pump still doesn’t run, the fuel pump itself is likely faulty. Before replacing the pump, you can test it by applying 12 volts directly to the pump connector using a fused jumper wire .
Why Choose KEMSO Fuel Pump for Your 1992 Camaro
If you determine that your fuel pump needs replacement, you want a pump that offers reliability, performance, and peace of mind. That’s where KEMSO comes in. KEMSO offers high-performance fuel pumps that are designed as OEM replacements with direct fitment for a wide range of vehicles, including your 1992 Camaro.
Every KEMSO fuel pump is built to deliver consistent flow and pressure under demanding conditions, whether you’re restoring a classic Camaro or building a street performance car. What truly sets KEMSO apart is the lifetime warranty that comes with every fuel pump they sell. You install it once, wire it correctly, and you never have to worry about replacing it again.
KEMSO fuel pumps are tested to meet or exceed OEM specifications. They use high-grade internal components that resist ethanol and methanol blends, making them suitable for modern fuels and high-performance applications. The pumps are designed to work with standard relay wiring setups, so the wiring instructions in this guide apply directly to installing a KEMSO pump in your car.
If you want a fuel pump that delivers reliability backed by a lifetime guarantee, visit KEMSO Racing at https://www.kemsoracing.com/ . Their product lineup includes pumps for almost every make and model, and their customer support team can help you select the right pump for your specific 1992 Camaro application.
Final Thoughts
The fuel pump relay on your 1992 Camaro is a small but critical component. Before you spend hundreds of dollars on a new fuel pump, take the time to locate, test, and if necessary, replace the relay. It’s a simple DIY job that can save you time, money, and frustration.
Remember to check the overlooked fuse in the small black box near the battery, as this is a common point of failure that many owners miss . If you do need to bypass the relay for testing, always use a fused wire and never drive the vehicle with the bypass in place .
For a permanent and reliable solution, invest in a quality replacement relay and, if needed, a KEMSO fuel pump backed by a lifetime warranty. Your 1992 Camaro deserves parts you can trust.
For more information on KEMSO fuel pumps and to browse their full product line, visit https://www.kemsoracing.com/ .