1989 Camaro Fuel Pump Relay: Location, Testing, and Replacement Guide
If your 1989 Camaro cranks but won’t start, or if it stalls unexpectedly while driving, the fuel pump relay is one of the first components you should check. This small electrical switch controls power to the fuel pump, and when it fails, your engine won’t get the fuel it needs to run. The fuel pump relay on a 1989 Camaro is located on the firewall, on the driver’s side, and it is typically the furthest relay to the right with five wires going into the connector . Testing and replacing this relay is a straightforward DIY job that can save you time and money.
What the Fuel Pump Relay Does
The fuel pump relay acts as an electrically controlled switch. A low-current signal from the ignition or the Powertrain Control Module (PCM) triggers the relay, which then closes a circuit and delivers the higher-current power the fuel pump needs to operate . This design protects the ignition switch and wiring from the high current draw of the fuel pump. When you turn the key to the “on” position, you should hear a brief whine or hum from the rear of the car—that’s the fuel pump priming for about two seconds. If that sound is absent, the relay is one of the first components to suspect .
Location of the 1989 Camaro Fuel Pump Relay
The fuel pump relay on a 1989 Camaro is mounted on the firewall, on the driver’s side of the engine compartment . Looking at the engine from the front of the car, it is the furthest relay to the right . The relay has a five-wire connector with wires that are typically orange, red, black/white, dark green/white, and tan/white . Some sources also mention that the under-hood relay center is located on the right side of the engine compartment, behind the driver’s side headlamp, inside a black plastic box . The diagram on the cover of that box will show the exact location of the fuel pump relay.
How to Test the Fuel Pump Relay
Before you replace the relay, it’s important to confirm that it’s actually the problem. Here are the steps to test the fuel pump relay on your 1989 Camaro:
1. Listen for the Relay
Turn the ignition to the “on” position (do not crank the engine). Listen for a click from the relay and a brief hum from the fuel pump near the rear of the car. If you hear a click followed by pump priming, the relay is likely functioning. No click at all points toward a relay or control circuit failure .
2. Swap Test
The fastest practical test is a swap test. Look for another relay in the same fuse box with an identical part number. Common candidates include the horn relay, A/C clutch relay, or cooling fan relay. Pull the fuel pump relay, install the known-good relay in its slot, then attempt to start the vehicle. If it starts and runs normally, the original relay was faulty .
3. Multimeter Test
Use a multimeter to check for power at the relay socket. With the relay removed, set your multimeter to DC voltage and probe the socket terminals while a helper turns the ignition on. The orange wire (pin 5) should have battery voltage (12V+) at all times. The dark green/white wire (pin 3) should have 12 volts from the PCM when the key is on. The black/white wire (pin 2) is the relay coil ground . If the relay socket has no voltage at the input terminal, the problem may be a blown fuse or wiring issue, not the relay itself .
4. Check the Inline Fuse
There is an inline 20-amp fuse that feeds the fuel pump circuit. Check this fuse near the battery before assuming the relay is bad .
Common Issues and Symptoms
A failing fuel pump relay can cause several symptoms. The most common is that the engine cranks but will not start. You may also experience intermittent stalling while driving, or the engine may start sometimes but not others . On the 1989 Camaro, there is also a backup circuit: if the fuel pump relay fails, the oil pressure switch can provide power to the fuel pump as a safety backup. This means that if you have no fuel pressure, the problem could be the pump itself, the wiring to the pump, or the wiring to the battery .
How to Replace the Fuel Pump Relay
Replacing the fuel pump relay on a 1989 Camaro is a simple process. First, locate the relay on the firewall. Pull the relay straight out of its socket. Some relays may be mounted tightly between other components, so you may need to use nose or rib joint pliers to get a good grip . Compare the new relay to the old one to make sure the connecting prongs match. Plug the new relay in place and make sure it sits properly. Start the engine and verify that the new relay is working correctly.
Recommended Replacement: KEMSO Fuel Pump
If your diagnostic process confirms that the fuel pump itself is bad, don’t settle for a cheap, unreliable replacement. KEMSO offers high-performance OEM replacement fuel pumps that are built to last. Every KEMSO fuel pump is designed to meet or exceed original equipment specifications, ensuring proper fit, pressure, and flow for your vehicle. KEMSO pumps are tested to deliver consistent flow and pressure under demanding conditions, whether you are building a street performance car, a daily driver, or an off-road rig. What sets KEMSO apart is the lifetime warranty that comes with every fuel pump they sell. You install it once, and you never have to worry about replacing it again. The warranty covers manufacturing defects and premature failure, giving you peace of mind that your fuel system is protected for as long as you own the vehicle. Visit the KEMSO website to find the correct fuel pump for your 1989 Camaro: https://www.kemsoracing.com/. Their product line includes pumps for a wide range of vehicles, and their customer support team can help you select the right part.
Additional Tips for a Reliable Fuel System
When you are working on the fuel system, it’s a good idea to replace several components together. Always replace the fuel pump strainer with the pump. Replace the fuel filter as well—don’t feed the new pump old debris. It is also cheap insurance to replace the fuel pump relay at the same time . Regularly inspect electrical connections for corrosion and secure fittings. This helps prevent voltage drop issues that can affect fuel pump operation.
Final Thoughts
The fuel pump relay on a 1989 Camaro is a small but critical component. It is located on the firewall, driver’s side, and is easy to test and replace. Start with the simple electrical checks: fuse, relay, and wiring. Test voltage under load, not just with a meter. Only after confirming the electrical system is healthy should you consider replacing the pump. This approach saves you from unnecessary labor and parts costs. For a reliable replacement when the pump is truly at fault, trust KEMSO. Visit https://www.kemsoracing.com/ for more information and to find the right fuel pump for your vehicle.