2005 Lincoln Navigator Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2005 Lincoln Navigator and How to Fix Them

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Reviewed by
Andrew Hajjar
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 2005 Lincoln Navigator 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 2005 Lincoln Navigator 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 throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

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.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2005 Lincoln Navigator?

When faced with a non-functional cruise control in a 2005 Lincoln Navigator, it's crucial to adopt a systematic diagnostic approach. Start by checking the fuse associated with the cruise control system; a blown fuse can often be the simplest fix. Next, ensure that the cruise control settings are properly configured and engaged while driving, as incorrect settings can lead to functionality issues. It's also important to verify that the brake lights are operational, since a malfunctioning brake light can signal to the system that the brakes are engaged, disabling cruise control. Following this, inspect the speed sensors, as they are vital for the cruise control to function correctly. Utilizing a diagnostic scanner to check for any error codes can provide insights into underlying problems. Lastly, examine the throttle and brake pedals for any obstructions or malfunctions that could be affecting the cruise control operation. By methodically working through these steps, you can effectively diagnose and potentially resolve the issues with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2005 Lincoln Navigator?

When troubleshooting cruise control issues in a 2005 Lincoln Navigator, it's essential to consider several common problems that could be at play. Start by examining the control module, as failures in this component, along with related sensors or switches, are frequent culprits. Additionally, throttle actuation problems can disrupt the system's functionality, so ensure that the throttle body is operating correctly. The vacuum actuator and brake deactivation switch on the master cylinder are also critical; if either is malfunctioning, it can prevent the cruise control from engaging. Don't overlook the possibility of blown fuses, which can interrupt the power supply to the cruise control system. Furthermore, check the brake pedal position sensor and the PRNDL/shifter position switch, as issues here can also lead to cruise control failure. Lastly, be aware that a faulty brake light or a bad brake switch, along with any engine-related problems indicated by a check engine light, can hinder the cruise control's operation. By systematically addressing these areas, you can effectively diagnose and potentially resolve the cruise control issues in your Lincoln Navigator.

How urgent is it to repair the non-functioning cruise control in a 2005 Lincoln Navigator?

When contemplating the urgency of repairing the non-functioning cruise control in a 2005 Lincoln Navigator, it is essential to weigh the potential consequences of inaction. A malfunctioning cruise control system can compromise safety, particularly during long drives where maintaining a consistent speed is crucial. This inconsistency can lead to fatigue and increased risk of accidents. Additionally, the absence of cruise control can detract from the overall driving experience, making long trips less comfortable and more taxing. If you frequently travel long distances, the convenience of cruise control becomes even more significant, and its failure may warrant immediate attention. Furthermore, if you plan to sell your Navigator in the future, addressing this issue can enhance its resale value, as prospective buyers often look for well-maintained features. Ultimately, while the urgency may vary based on individual driving habits, prioritizing the repair of your cruise control system can lead to a safer, more enjoyable driving experience and protect your vehicle's value.

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