Saturn Relay Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Saturn Relay and How to Fix Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Saturn Relay cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a Saturn Relay cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

Troubleshooting Cruise Control Issues in a Saturn Relay

When troubleshooting cruise control issues in your Saturn Relay, it's essential to adopt a methodical diagnostic approach. Begin by checking the simplest components, such as the fuses related to the cruise control system; a blown fuse can often be the culprit behind a non-functioning system. Next, inspect the cruise control lever and buttons for any signs of wear or malfunction, as these can prevent the system from engaging. If these initial checks do not resolve the issue, assess the condition of the brake pedal and throttle body, as problems in these areas can directly impact cruise control functionality. Additionally, consider the status of the control module, sensors, and switches, as failures in these components are common causes of cruise control malfunctions. If your vehicle has a check engine light illuminated, it’s crucial to address any engine-related issues, as they may also affect the cruise control system. Lastly, if the cruise control buttons are integrated into the steering wheel, a faulty clock spring could be the source of the problem. By following this structured approach, you can effectively identify and resolve the underlying issues affecting your Saturn Relay's cruise control system.

What Could Cause the Cruise Control to Malfunction in a Saturn Relay?

When dealing with a malfunctioning cruise control system in a Saturn Relay, it's essential to understand the common problems that could be causing the issue. One of the first things to check is the fuses; a blown fuse can disrupt the power supply to the cruise control, rendering it inoperable. Additionally, the brake pedal position sensor plays a crucial role in the system's functionality, and any issues here can lead to malfunctions. The throttle body is another critical component; if it is not functioning correctly, the cruise control may fail to engage or maintain speed. Furthermore, problems with the PRNDL or shifter position switch can also affect the cruise control's operation. It's also important to inspect the brake light and brake switch, as a faulty brake light can signal to the system that the brakes are engaged, disabling cruise control. Lastly, engine-related issues, such as a check engine light, can prevent the cruise control from working properly. By systematically checking these components, you can effectively diagnose and potentially resolve the cruise control issues in your Saturn Relay.

Why is the Cruise Control Not Working in a Saturn Relay?

When your Saturn Relay's cruise control system fails, it’s crucial to understand the urgency of diagnosing and fixing the problem. Ignoring symptoms such as unresponsive controls or erratic speed regulation can not only compromise your driving experience but also pose significant safety risks on the road. For instance, a malfunctioning cruise control can lead to unexpected acceleration or deceleration, making it difficult to maintain control of the vehicle. Additionally, underlying issues like a blown fuse, a defective brake pedal switch, or a faulty vehicle speed sensor can escalate into more severe problems if left unaddressed. Therefore, it’s advisable to conduct a thorough inspection of the cruise control module, throttle system, and related components to ensure your vehicle operates safely and efficiently. Taking prompt action not only enhances your driving safety but also helps prevent costly repairs down the line.

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