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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.
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
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.
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
It can directly replace old or damaged parts. Professionally manufactured, high precision and durable.
OE Number:136800-0010
Fitment:/Fit For 1987-1991 for Toyota for Camry & Celica 20l
Installation Method: Simple installation, no special professional tools can be installed directly, so that the vehicle idle more smoothly, the car no longer stall.
【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...
Vehicle Fitment - Compatible for Mazda 3 2008-2014, for Mazda 5 2005-2019, for Ford Kuga 2013-2019, for Ford Focus 2010-2018, for Volvo v40 2012-2019.
[REPLACE PART NO.] 1137328464 1137328567. Prior to buying, please verify the make, model, and year of your vehicle.
Function - Engine Cooling Fan Controller that precisely controls fan speed to provide the most efficient cooling at all engine operating conditions and maximize fuel economy.
Directly Fit - OE replacement Engine Cooling Fan Controller, easy to fit. Easy to install with simple tools in just minutes. No special tools are required for installation.
Last update on 2026-10-17 / 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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