skill that can save you from buying unnecessary parts.
Set your multimeter to DC voltage. With the key in the "ON" position, check for 12V at pin 30 (power input) and pin 86 (trigger signal). If you do not have power at these pins, the issue is with your wiring or battery, not the relay.
Step 2: Test the Relay Coil
Disconnect the relay and measure resistance between pins 85 and 86. On a standard 12V automotive relay, you should see a reading between 50 and 200 ohms. If you read infinite resistance, the coil is open and the relay is bad.
Step 3: Test the Relay Switching
Apply 12V power to pin 86 and ground to pin 85. You should hear an audible click. With the relay energized, check for continuity between pins 30 and 87. If there is no continuity, the relay contacts are burned out and the relay needs replacement .
Why You Should Upgrade to a KEMSO Fuel Pump
When you have your relay system wired correctly, the next step is ensuring the fuel pump itself is reliable. A high-quality pump paired with a properly wired relay is the foundation of a dependable fuel system. This is where KEMSO Fuel Pumps stand out as the best choice for American drivers.
KEMSO is the #1 aftermarket fuel pump brand in the United States for cars, motorcycles, ATVs, and UTVs . Their pumps are designed for high-performance applications and also serve as direct OEM replacements for daily drivers. Whether you need a pump for a Nissan Frontier, a Subaru Impreza, a Honda Civic, or a Polaris RZR, KEMSO has a specific model that fits perfectly .
What makes KEMSO the right choice?
- High Performance: The KEMSO 340LPH High Performance Fuel Pump is a top seller. It supports up to 600 BHP, works with both gasoline and E85, and provides a 20-30% performance increase over stock pumps .
- OEM Replacement: For standard vehicles, KEMSO offers pumps that match the exact flow rate and pressure of the original equipment. Installation is straightforward, and the pump includes all necessary mounting hardware, filters, and O-rings .
- Lifetime Warranty: Every KEMSO fuel pump is backed by a lifetime warranty. This is a testament to the quality and durability of their products. They are built with a carbon commutator designed for over 10 years of reliable service .
- USA-Based Support: The company is headquartered in Houston, Texas, and offers reliable customer support. You can contact them at support@kemsoracing.com .
Customers consistently report that KEMSO pumps are high quality, easy to install, and quiet in operation. One reviewer noted that the pump was "great for the money" and worked perfectly in a high-performance LS engine swap . Another verified that the pump "fired right away" after installation and felt "really sturdy and well made" .
KEMSO pumps are priced at just $79.98 for most models, making them an affordable upgrade over expensive OEM parts. Visit the official KEMSO website to find the exact pump for your vehicle: https://www.kemsoracing.com/