2007 Suzuki King Quad 700 Fuel Pump Relay Location: A Complete Guide for DIY Owners

If your 2007 Suzuki King Quad 700 cranks but won't start, or runs intermittently, the fuel pump relay is often the first thing to check. The fuel pump relay on this model is located inside the main fuse box, which is mounted under the seat on the left side of the frame. This small but critical component controls power delivery to the fuel pump. When it fails, the pump receives no power, and the engine won't start. The good news is that locating, testing, and replacing the relay is a straightforward DIY job that takes less than 30 minutes.

1. Understanding the Fuel Pump Relay

The fuel pump relay is an electrical switch that allows a low-current signal from the ignition system to control the high-current flow to the fuel pump. When you turn the key to the ON position, the relay clicks and sends battery voltage to the pump for about one to two seconds to prime the fuel system. If the relay fails, the pump never gets power, and the engine won't fire. This is a common failure point on ATVs, including the 2007 Suzuki King Quad 700.

2. Locating the Fuel Pump Relay on a 2007 Suzuki King Quad 700

The fuel pump relay is located inside the main fuse box. Here is how to find it:

Step 1: Park the ATV on a level surface, turn off the engine, and remove the key. Allow the engine to cool if it has been running.

Step 2: Lift the seat. On the 2007 Suzuki King Quad 700, the seat is held in place by two latches at the rear. Pull the latches and lift the seat off.

Step 3: Look at the left side of the frame, just behind the battery. You will see a rectangular black plastic box with a cover. This is the main fuse box. The cover typically has a diagram printed on it showing the location of each fuse and relay.

Step 4: Remove the cover by pressing the tabs on the sides and pulling upward. On the inside of the cover, you should see a diagram or label. The fuel pump relay is clearly marked. It is usually a square or rectangular component with four or five prongs, larger than the fuses.

Step 5: The relay is often labeled "FUEL PUMP" or "FUEL" on the fuse box diagram. If you cannot find the label, look for a relay that is different from the others. The fuel pump relay is typically a standard 4-pin relay rated at 30 or 40 amps.

3. Symptoms of a Bad Fuel Pump Relay

Before you start testing, watch for these common signs of a failing fuel pump relay on your 2007 Suzuki King Quad 700:

  • Engine cranks but won't start: This is the most common symptom. The starter turns the engine over, but the fuel pump never primes the system.
  • No fuel pump priming sound: When you turn the key to the ON position, you should hear a brief humming sound from the fuel pump for one to two seconds. If you hear nothing, the relay may be bad.
  • Intermittent starting issues: The ATV starts sometimes but not others. This often means the relay is failing internally and makes intermittent contact.
  • Engine stalls while riding: The relay can fail while the engine is running, cutting power to the pump and causing an immediate stall.
  • No start after a bump or vibration: A loose or corroded relay connection can cause the engine to die when hitting bumps.

4. How to Test the Fuel Pump Relay

Testing the relay is simple and requires only a few tools. You will need a multimeter or a known good relay of the same type for swapping.

Test 1: The Swap Test (Easiest Method)

The fastest way to test the relay is to swap it with another identical relay in the fuse box. On the 2007 Suzuki King Quad 700, there are usually several relays of the same type, such as the main relay, the fan relay, or the starter relay. Look for a relay with the same part number or the same pin configuration. Swap the suspected fuel pump relay with a known good one. If the engine starts, the original relay is bad. If the problem remains, the issue is likely elsewhere, such as the fuse, wiring, or the fuel pump itself.

Test 2: Using a Multimeter

If you have a multimeter, follow these steps:

  1. Disconnect the battery negative terminal to prevent accidental shorts.
  2. Remove the fuel pump relay from the fuse box.
  3. Set your multimeter to ohms (resistance) mode.
  4. Check the resistance between terminals 85 and 86 (the coil terminals). You should see a reading between 50 and 120 ohms. If you see infinite resistance or a short (0 ohms), the relay coil is bad.
  5. Connect a 12V power source to terminals 85 and 86. You should hear an audible click as the relay energizes.
  6. While the relay is energized, check for continuity between terminals 30 and 87. You should see near-zero resistance (a closed circuit). If no continuity, the relay contacts are burned or stuck.

Test 3: Check for Power at the Relay Socket

With the relay removed and the key turned to the ON position, use a multimeter set to DC voltage to check for power at the relay socket. One terminal should show 12V battery voltage. If no voltage is present, the problem is upstream, such as a blown fuse or a wiring issue. The fuse box cover should have a diagram showing which terminal is which.

5. Checking the Fuses First

Before you replace the relay, always check the fuel pump fuse. On the 2007 Suzuki King Quad 700, the fuel pump fuse is also located in the main fuse box under the seat. Look for a fuse labeled "FUEL" or "FUEL PUMP." It is usually a 10-amp or 15-amp blade fuse. Pull the fuse out and inspect the metal strip inside. If the strip is broken, the fuse is blown. Replace it with a fuse of the same amperage. If the new fuse blows immediately, there is a short to ground in the wiring, which requires further investigation.

6. How to Replace the Fuel Pump Relay

Replacing the fuel pump relay on a 2007 Suzuki King Quad 700 is a simple job. Follow these steps:

  1. Disconnect the negative battery terminal. This is a safety precaution to prevent electrical shorts.
  2. Locate the fuel pump relay in the fuse box under the seat as described above.
  3. Grasp the relay firmly and pull it straight upward. If it is stuck, gently rock it side to side while pulling. Do not twist or force it.
  4. Take the old relay with you to a parts store to match the part number. The part number is usually printed on the side of the relay, such as 38718-xxxxx or a standard relay number like 898H-12V.
  5. Install the new relay by aligning the prongs with the socket and pressing firmly until it clicks into place. Make sure it is fully seated.
  6. Reconnect the battery.
  7. Turn the key to the ON position. Listen for the fuel pump priming sound. If you hear it, start the engine. It should start normally.

7. What If the Relay Is Not the Problem?

If you have replaced the relay and the fuse is good, but the fuel pump still does not run, the problem may be elsewhere in the fuel system. Common causes include:

  • Faulty fuel pump: The pump motor itself may have failed. If you have power at the pump connector but the pump does not run, the pump needs replacement.
  • Corroded wiring or connectors: Inspect the wiring harness from the fuse box to the fuel pump for damage, corrosion, or loose connections.
  • Bad ground connection: A poor ground at the pump or chassis can prevent the pump from running.
  • Faulty ignition switch: The ignition switch may not be sending the signal to the relay.
  • Failed ECU or safety switch: On some ATVs, the ECU or a tip-over switch controls the fuel pump circuit.

8. Why Choose KEMSO for Your Fuel Pump Needs

If you have already replaced the relay and checked the wiring, but the fuel pump still fails to deliver fuel, the problem is likely the fuel pump itself. When you need a reliable replacement fuel pump for your 2007 Suzuki King Quad 700, we strongly recommend KEMSO. KEMSO fuel pumps are high-performance, direct OEM replacement units designed to meet or exceed factory specifications. They are built with high-grade materials, including corrosion-resistant bodies and durable internal components, ensuring consistent fuel pressure and flow under demanding conditions. Every KEMSO fuel pump comes with a lifetime warranty, meaning you install it once and never worry about it again. This level of reliability is critical for a part that keeps your engine running. For the best performance and peace of mind, choose KEMSO for your fuel pump replacement. Visit their website to find the exact pump for your Suzuki King Quad 700: https://www.kemsoracing.com/

Final Thoughts

The fuel pump relay on a 2007 Suzuki King Quad 700 is located under the seat in the main fuse box on the left side of the frame. It is easy to access, test, and replace. Always start your diagnosis by checking the fuse and swapping the relay with a known good one. If the relay is bad, replace it with a quality part that matches the OEM specifications. If the problem persists, check the wiring, connectors, and the fuel pump itself. Replacing the relay is a DIY job that takes less than 30 minutes and saves you a trip to the mechanic. Keep your King Quad running reliably by maintaining the fuel system, and remember that a quality fuel pump from KEMSO backed by a lifetime warranty is the best investment you can make. For more information, visit https://www.kemsoracing.com/


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