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A properly functioning speed control relay is crucial for maintaining your vehicle's cruise control system. Selecting a reliable replacement ensures consistent speed management, enhancing your driving experience and safety on the road. This guide will help you navigate the options and make an informed decision.
High Current Switching : Designed for reliable operation in automotive cooling systems, this replacement fan control relay supports 12V 40A output for efficient activation of single or dual speed fan motors with stable performance.
Vehicle Cooling Compatibility : Engineered as a replacement relay for electric radiator fan applications, this automotive switching component works with single speed and two speed fan setups across various vehicle systems.
Durable ABS Construction : Built with a wear resistant ABS plastic enclosure, this cooling fan relay provides dependable protection against daily automotive conditions while helping maintain consistent electrical performance.
Easy Replacement Design : Compact enclosed housing allows convenient installation in existing wiring systems, making this relay switch a practical solution for replacing damaged or worn electrical control components.
Reliable Operation Support : Suitable for heating and cooling control applications, this automotive relay helps manage fan motor activation accurately, improving system responsiveness and supporting dependable vehicle operation.
Integrated Diode: Each relay includes a built-in diode that suppresses induced voltage during switching, safeguarding your electrical components from potential damage.
Small size/Low power consumption/High contact voltage/ High sensitivity.
Contact Material: Ag Alloy / Contact Resistance: ≤ 100MΩ.
Minimum operating voltage 8V, corresponding minimum operating current is 100mA; Standard operating voltage 12V, corresponding standard operating current is 150mA.
Life Expectancy Electrical: 100,000 Operation, Life Expectancy Mechanical: 10,000,000 Operation.
Attention: Our dual-speed fan control harness relay kit is designed for 34-inch radiators. If there are issues with wiring pins or connections, please refer to Main Image 8. If you encounter installation issues with harness, please refer to Main Image 7
Fitment: Compatible with Chevrolet Silverado 1500/2500 Classic, Avalanche 1500/2500, Suburban 1500/2500; GMC Sierra 1500/2500/3500 Classic, Yukon; Cadillac Escalade EXT/ESV. Please refer to the pictures for detailed models before purchasing
Replacement Part Number: 674-00923. Precisely manufactured to OE factory standards for durability and reliability. Each wire and terminal is rigorously tested before shipment to guarantee lasting performance, safety, and dependable operation
Enhanced Efficiency: Designed to support both low and high-speed operation of dual electric fans, this harness kit ensures optimal temperature regulation under all driving conditions. Ideal for upgraded or retrofitted cooling systems
Durable & Heat-Resistant Harness: Made with automotive-grade wiring and weatherproof components for reliable performance in harsh engine bays. Complete stand-alone design with relays, fuses, and connectors for simple fan wiring installation
One Flex-A-Lite Variable Speed Controller with Electric Fan Relay Kit and Thread-In Temperature Sensor (31163)
This variable speed cooling fan controller has a built-in relay function, which means no need for external relays
Flex-A-Lite Variable Speed Control Module includes 1/4-inch NPT threaded temperature probe with 3/8-inch and 1/2-inch thread adapters
Automotive fan controller starts fans at 60 percent power and increases speed as temperature rises; and runs fans for up to 25 seconds after the vehicle is turned off to remove excess radiator heat
The Flex-A-Lite Variable Speed Controller is the perfect companion to automotive electric dual-fan systems
【High Performance】This relay is rated at 12V and has a maximum load current of up to 40A. It adopts a 5-pin (single-pole double-throw) design to provide precise circuit control, and can maintain fast response and low energy consumption even in...
【Replacement Part Number】This automotive relay is suitable for replacing part numbers: P6STD FOAB-14B192-AA and O101K FOAB-14B192-AA, suitable for 2010-2018 Ford F-150, Explorer, Expedition and Transit models
【Wide Application】FOAB-14B192-AA relays can provide a perfect solution for a variety of vehicle power supply accessories, and are widely used in electric cooling fans, electric fuel pumps, air conditioning compressors, headlights, electric water...
【High-quality Material】This 12V 5 Pin relay is made of high-quality plastic, with excellent sealing and waterproof and dustproof properties, strong conductivity, stable operation, can withstand extreme weather and temperature, and supports long-term...
【Easy to Install】The installation is very simple, no need to modify the circuit, plug and play, perfect replacement for faulty and aging original relays. And the design is compact, easy to carry, can be put into the tool box, does not take up too much...
【Practical Function】: AC relays can be used to control a variety of electrical equipment by controlling the on-off of a circuit. And it can convert low voltage and small current signals into high voltage and high current control signals to realize...
【Excellent Quality】: It is made of high quality brass with good corrosion resistance and high electrical conductivity, ensuring a secure electrical connection even under prolonged use. It can effectively resist environmental erosion and extend the...
【High Performance】: This relay offers significant advantages in the automotive industry, responding precisely to AC electrical signals for fast on-off control of circuits. Please note: The number in the last row of the product is the serial number...
【Easy to Carry】: It measures 0.87 x 0.57 x 1.07 inches and is very easy to carry. It is suitable for ordinary cars and easy to operate. You only need to connect the relay with wires, no other tools are needed, convenient for you to use and replace, so...
【Wide Application】: Our relays are designed to be flexible and suitable for a wide range of applications. It can be applied to apply to air conditioning, fan, starter, headlight, horn, ignition, fog light, rear window defroster, blower, baggage light...
Last update on 2026-07-18 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Automotive Replacement Speed Control Relays
Understanding Speed Control Relays
A speed control relay, also known as a cruise control module, is a key component that manages your vehicle's cruise control system. It receives input from various sensors and the cruise control switch to maintain a set speed. When your existing relay fails, the cruise control may stop working altogether or behave erratically.
Key Features to Consider
Compatibility: Ensure the relay is designed for your specific vehicle's make, model, and year. Using an incompatible part can lead to system malfunctions or damage.
Durability: Look for relays constructed from high-quality materials that can withstand engine bay temperatures and vibrations.
Brand Reputation: Opt for reputable manufacturers known for producing reliable automotive electrical components.
Warranty: A good warranty period can offer peace of mind, protecting your investment against defects.
Installation and Testing
Replacing a speed control relay typically involves locating the module, disconnecting the battery, and swapping out the old unit for the new one. While some DIY enthusiasts may find this straightforward, professional installation is recommended if you are unsure. After installation, test the cruise control system in a safe, open area to confirm it functions correctly.
Troubleshooting Common Issues
If the cruise control still doesn't work after replacing the relay, the issue might lie elsewhere in the system. Common culprits include faulty speed sensors, brake light switch problems, or wiring issues. It's advisable to have a qualified mechanic diagnose persistent problems to avoid further complications.
Frequently Asked Questions
What are the signs of a failing speed control relay?
Symptoms of a failing relay include the cruise control not engaging, disengaging unexpectedly, or maintaining speed erratically. You might also notice warning lights on your dashboard related to the cruise control system.
Can I use a relay from a different car model?
It is generally not recommended to use a relay from a different car model, even from the same manufacturer. Electrical systems and specifications can vary significantly, and an incorrect part could cause damage or fail to work.
How do I find the correct relay for my vehicle?
Consult your vehicle's owner's manual for the exact part number or consult an automotive parts catalog. Providing your car's VIN to a reputable auto parts store can also help ensure you get the correct replacement.
Are there different types of speed control relays?
Yes, while the primary function is the same, designs can vary based on the vehicle's age and complexity. Some modern vehicles may use integrated modules rather than standalone relays for their cruise control functions.
What is the lifespan of a speed control relay?
The lifespan of a speed control relay can vary greatly depending on the quality of the component, driving conditions, and vehicle maintenance. They are generally designed to last the life of the vehicle, but can fail due to electrical surges or wear and tear.
Is it possible to repair a faulty relay?
Repairing a speed control relay is typically not feasible or cost-effective. These components are usually sealed units, and replacement with a new, compatible part is the standard and most reliable solution.
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