How to Bypass Honda Main Relay: Easy Steps to Follow.


To bypass a honda main relay, locate the relay’s 7-pin connector and jump the 5th pin to either the 2nd or 6th pin. This will connect the fuel pump directly to the battery.

When a honda fails to start, the problem is often the main relay. The relay’s job is to ensure that the fuel pump receives the proper voltage to start the engine. When the relay fails, the fuel pump will not activate, causing the engine to stall.

To bypass the honda main relay, locate the relay’s 7-pin connector and jump the 5th pin to either the 2nd or 6th pin. This will connect the fuel pump directly to the battery. This hack is only temporary, and the main relay should be replaced as soon as possible.

How to Bypass Honda Main Relay: Easy Steps to Follow.


Understanding The Main Relay And Its Significance

What Is A Honda Main Relay?

Have you ever experienced trouble while starting your honda car? In such cases, it might be because of a faulty main relay. The honda main relay is an essential component in the car that powers up the fuel pump and sends power to other critical components.

It is responsible for starting the engine and transmitting fuel to the engine. The relay is an electrically operated switch that receives electrical signals from the ecu (engine control unit) and sends them to the fuel pump to start the engine.

Why Is It Important To Bypass A Honda Main Relay?

It is essential to know how to bypass the main relay of your honda car because a faulty relay might lead to starting problems, which can be frustrating. The primary purpose of bypassing the main relay is to test if it is faulty or not.

Troubleshooting the main relay is an essential initial step to identify the root cause of the starting problem. In such cases, bypassing the main relay can provide a quick solution to the problem.

Common Symptoms Of A Faulty Honda Main Relay

Detecting a faulty main relay can be difficult, but knowing the common symptoms can help minimize the guesswork. Here are some typical symptoms of a faulty honda main relay:

  • The engine starts, but then stalls.
  • The car is difficult to start, or it takes a lot of attempts to get it started.
  • The engine does not start at all.
  • You cannot hear the fuel pump come up when your car is in the ignition position.
  • The main relay stays on even after turning the engine off.

If any of these symptoms are present, it is advisable to troubleshoot the main relay for fault identification.

Understanding the significance of the honda main relay and identifying the faults is crucial in getting your car back on the road. Bypassing the relay can provide a temporary solution, but permanent repairs are always better in the long run.

Regular maintenance and proper care of your honda car will help in avoiding such problems in the future.

Tools And Equipment Needed For Bypassing A Honda Main Relay

Before proceeding with the process of bypassing a honda main relay, ensure that you have all the necessary tools and equipment at hand. Here are some of the essential ones you need:

Essential Tools To Have

  • Wrench set: This toolset is necessary for disconnecting the battery and removing the relay.
  • Screwdrivers: You need a philips screwdriver for removing the screws that hold the dashboard, while a flathead screwdriver is necessary for prying the relay.
  • Needle-nosed pliers: These are essential for removing wires from the harness.
  • Electrical tape: Elemental in covering wires and preventing any electrical sparks or shorts.

Safety Precautions To Observe

It is crucial to observe the following precautions before attempting to bypass your honda main relay.

  • Disconnect the battery: Before working on any electrical component of your car, always disconnect the battery to eliminate any risk of electrical shock or sparks.
  • Let the car cool down: Avoid working on your honda car after intensive use and when the engine is still hot. This safe practice helps avoid the risk of burns or damage to the engine components.
  • Put on safety gear: Always wear safety goggles and gloves to protect your eyes and hands from debris, sharp edges, harmful substances, or hot components.

Steps To Ensure Safety

Now that you have all the required equipment and understand some precautions to observe let’s discuss some safety measures during the honda main relay bypassing process itself.

  • Keep your workspace well lit.
  • Do not force any parts. If something doesn’t come off easily, double-check what is wrong and find a way to carefully remove it.
  • Use common sense: If something seems dangerous, stop and double-check before proceeding.
  • Follow the procedure: When bypassing the honda main relay, follow each step of the procedure carefully and logically. Elevate if there might be something that you don’t understand or if there is a chance that you misread the steps.

Following the steps above ensures that you stay safe throughout the process of bypassing your honda main relay. Now that you understand the tools required let’s move onto the process to follow.

How To Bypass A Honda Main Relay

Honda vehicles are well-known for their reliability and dependability. However, even the most dependable vehicle may encounter some issues over time. One of the most common problems honda owners face is a failed main relay, which interrupts the fuel pump’s power supply, causing the car to stall or not start at all.

Fortunately, bypassing a honda main relay is a simple process that can save both time and money. We will cover everything you need to know about bypassing a honda main relay and getting your vehicle back on the road in no time.

Step-By-Step Guide On How To Bypass A Honda Main Relay

Bypassing a honda main relay requires minimal tools and expertise, making it a quick and easy process. Here’s a step-by-step guide to help you through the process:

  • Gather the necessary tools: You will need a flat-head screwdriver, wire strippers, and a piece of electrical wire.
  • Locate the main relay: Locate the main relay under the dashboard on the driver’s side, attached to the steering column.
  • Remove the main relay cover: Gently pry off the cover with a flat-head screwdriver to access the main relay’s circuits.
  • Identify the fuel pump circuit: Identify the fuel pump circuit by searching online for honda’s main relay location and diagram of circuits.
  • Remove the circuit board: The circuit board is held in place by plastic retainers. Just twist them, and it pops out.
  • Prepare the wire: Strip both ends of the wire with your wire strippers.
  • Short-circuit wires: Insert each stripped end of the wire into the terminals of the fuel pump circuit. This will create a short circuit, allowing the fuel pump’s power supply to bypass the main relay and directly power the fuel pump.
  • Test the vehicle: Once you have successfully short-circuited the fuel pump circuit, turn on the ignition system, and check to see if it starts.

Tips And Tricks For A Smooth Bypassing Process

While bypassing a honda main relay is a straightforward process, there are a few tips and tricks you can follow to ensure a smooth and successful bypass:

  • Safety first: Always disconnect the battery before proceeding with the main relay bypass process.
  • Keep the wires short: Use a short piece of wire to prevent interference with other electrical components that could cause a short circuit and damage to your vehicle’s electrical system.
  • Stay aware of your surroundings: Depending on the honda’s model, accessing the main relay can be tricky, requiring contorted body positions. Avoid damaging other electrical components by keeping a keen eye and steady hand.
  • Ensure the wire is secure: Make sure that the wire stays in place and doesn’t become loose, as this could cause intermittent electrical problems and further damage.
  • Consult a professional: If you are unsure about the process, or if you’re not confident in your abilities, it’s best to consult a professional technician for your safety and peace of mind.

Common Mistakes To Avoid

Although bypassing a honda main relay is a simple process, it’s important to avoid making common mistakes that could cause further damage to your vehicle. Here are some common mistakes to avoid:

  • Bypassing the wrong circuit: It’s imperative to identify the correct fuel pump circuit to avoid short-circuiting the wrong relay and causing further damage.
  • Short-circuiting wires too long: Using wires that are too long can cause interference with other electrical components, leading to intermittent electrical problems, such as stalling, and damage to your car’s electrical system.
  • No electric tape or insulation: Once you’ve bypassed the fuel pump circuit, ensure that any exposed wiring is taped or insulated to avoid contact with other electrical components, causing intermittent electrical problems or short circuits.
  • Not seeking professional advice: If you’re unsure about anything related to the bypassing process or your car’s electrical system, it’s always best to consult a professional technician. Attempting to bypass the main relay yourself could result in further damage to your vehicle and be a safety risk.

Bypassing a honda main relay is a simple process that can save both time and money. While it’s essential to follow the correct procedures and take appropriate measures, such as consulting a professional if necessary. By following the tips and tricks outlined above and avoiding common mistakes, you can bypass the main relay on your honda vehicle quickly and safely, and get back on the road in no time.

Testing The Main Relay

If you suspect that your honda may be having issues with the main relay, it’s important to perform some diagnostic tests before taking it to a mechanic. By testing the main relay yourself, you can save money on repairs and potentially fix the problem on your own.

Here are the key steps to take when testing the main relay, along with some indicators that the relay may be faulty, and techniques for identifying other causes of a malfunctioning main relay.

How To Test The Main Relay:

  • Start by locating the main relay, which is usually mounted on the driver’s side under the dashboard of most honda models.
  • Remove the relay from its housing and examine it for any signs of damage such as frayed wires or burnt connections.
  • Next, use a multimeter to test the continuity of the relay’s pins. This is done by placing one lead of the multimeter on one of the relay’s pins and the other lead on another pin. When the multimeter displays a reading, this means that there is continuity between those two pins.
  • Repeat this process for all the pins to check whether any of them are defective.
  • If the readings on the multimeter indicate that the pins are fine, try testing the relay under load. This requires using a jumper wire to connect two specific pins on the relay while the key is turned to the “on” position. If the fuel pump engages, this means that the relay is functioning correctly.

Common Indicators That The Relay Is Faulty:

  • If your honda won’t start, or experiences intermittent starting problems, there is a chance that the main relay is faulty.
  • Another indicator of a troubled main relay is if you hear a clicking noise when you turn the key in the ignition but the engine does not turn over. This could also be indicative of a dead battery or a starter problem.

Troubleshooting Techniques To Identify Other Causes Of A Faulty Main Relay:

  • One possible cause for starting problems that appears similar to those occurring because of a faulty main relay may be a security system malfunction or a bad ignition switch.
  • A faulty fuel pump or clogged fuel filter could also lead to poor engine performance or starting problems.
  • An obdii scan tool can be used to check for error codes in the engine’s computer to see if any issues are detected.

By following these steps and checking these other possible causes, you can troubleshoot and diagnose whether your honda’s main relay is faulty. This knowledge and experience can save you money and give you peace of mind knowing how to test and potentially repair your vehicle’s systems.

Final Information And Recommendations

Essential Points To Remember Before Bypassing A Honda Main Relay

Bypassing a honda main relay involves electrical work, and you must always take precautions before attempting any electrical repair in your car. Here are some essential points to remember before bypassing a honda main relay.

  • Always use gloves to avoid electrocution.
  • Disconnect the car battery before starting the repair.
  • Make sure to read the honda’s user manual before attempting any repair.
  • Always work in a well-ventilated area.
  • Use genuine honda parts in case of replacement.

Understanding The Importance Of Professional Assistance

Before attempting any repair on your honda, you must consider the importance of professional assistance. Trying to bypass a honda main relay without any knowledge or experience can result in dangerous consequences. Here are some reasons why you should seek help from a professional:

  • A professional has the right tools and equipment for the repair.
  • They possess extensive knowledge and experience in repairing honda cars.
  • They can diagnose any other issues or underlying problems in your car.
  • They can guide you through the process and answer any questions you may have.

Potential Risks Of Improper Bypassing Of A Honda Main Relay

Bypassing a honda main relay without proper knowledge or experience can result in potential risks and issues. Here are some problems you may face due to improper bypassing of a honda main relay:

  • Electrical shock and damage to the car wiring.
  • Damage to the car’s engine and other related parts.
  • Overheating of the car battery due to an improper supply of power.
  • Malfunctioning of the car’s electrical components.

Bypassing a honda main relay requires extensive knowledge and experience in the field of electrical work. Always seek professional assistance before attempting any diy repairs in your honda to avoid any potential risks or issues.

Frequently Asked Questions On How To Bypass A Honda Main Relay

What Is A Honda Main Relay?

A honda main relay is an electronic component that controls the fuel pump, among other things, in honda vehicles.

What Are The Symptoms Of A Faulty Main Relay?

Symptoms of a faulty main relay can include difficulty starting the engine, stalling or rough idling, and problems with fuel delivery.

How Can I Test My Honda’S Main Relay?

To test a honda’s main relay, follow these steps: locate the relay, remove the cover, observe the pins, and test the pins using a multimeter.

Can A Faulty Main Relay Cause A No-Start Condition?

Yes, a faulty main relay can cause a no-start condition in honda vehicles, as it may prevent the fuel pump from receiving power.

How Long Does It Take To Replace A Main Relay?

Replacing a main relay can take anywhere from 30 minutes to an hour, depending on the make and model of the vehicle and the experience of the technician.


After going through the steps on how to bypass a honda main relay, it is safe to say that it is not as difficult as it may seem. By following the aforementioned instructions, one can successfully troubleshoot the relay and determine whether it needs repair or replacement.

While it may seem like a daunting task, with the right tools and knowledge, one can easily bypass it and get their honda up and running in no time. It’s important to always prioritize safety when working with electrical components and to utilize caution and proper technique to prevent any injuries.

Remember to always seek professional assistance if you feel unsure or unsafe. With these tips, bypassing a faulty honda main relay is a breeze and can save you both time and money. All in all, troubleshooting the main relay in your honda can be a diy project with the right guidance and approach.

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