1991 Ford F-350 Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 1991 Ford F-350

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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 1991 Ford F-350 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 1991 Ford F-350 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.

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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

What are the initial steps to diagnose the non-functioning cruise control in a 1991 Ford F-350?

To effectively diagnose the non-functioning cruise control in your 1991 Ford F-350, start with the simplest solutions before moving on to more complex diagnostics. Begin by checking the fuses related to the cruise control system, as a blown fuse is a common and easily fixable issue. Next, inspect the connection between the cruise control computer and the LED tail lights, ensuring that the computer is receiving the necessary signals to operate correctly. After these checks, start the vehicle and examine the vacuum lines connected to the intake and brake booster for any signs of leaks, as a vacuum leak can significantly impact the cruise control's functionality. By following this systematic approach, you can efficiently narrow down the potential causes of the problem and take the necessary steps to restore your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 1991 Ford F-350?

When dealing with a malfunctioning cruise control system in a 1991 Ford F-350, it's essential to understand the common problems that could be at play. One of the first things to check is the fuse; a blown fuse can easily disrupt the entire system, so inspecting and replacing any damaged fuses is a straightforward first step. Next, consider the cruise control switch itself; if it shows signs of wear or damage, it may need to be replaced to restore functionality. Additionally, vacuum leaks can significantly impact the operation of the cruise control, so a thorough inspection for any leaks in the vacuum lines is crucial. The speed sensor also plays a vital role in the system's performance, and ensuring it is functioning correctly can prevent further issues. Don't overlook the brake light switch, as problems here can inadvertently disable the cruise control. Lastly, inspect the throttle cable for any fraying or misalignment, as these issues can hinder the system's ability to maintain speed. By systematically addressing these potential problems, you can effectively troubleshoot and potentially resolve the cruise control issues in your Ford F-350.

How urgent is it to repair the non-functioning cruise control on a 1991 Ford F-350?

When contemplating the urgency of repairing the non-functioning cruise control on your 1991 Ford F-350, it's essential to weigh the implications of neglecting this issue. While cruise control is primarily a convenience feature, its malfunction can lead to safety concerns, especially during long drives where driver fatigue is a factor. If the system's failure affects your ability to maintain control or focus on the road, addressing the repair becomes more pressing. Additionally, if you frequently embark on highway journeys, the benefits of cruise control in enhancing comfort and reducing strain on your foot can make the repair a higher priority. Furthermore, keeping all vehicle features in working order can positively impact your truck's resale value, making it a wise investment to fix the cruise control sooner rather than later. Ultimately, the decision hinges on your specific driving habits and the potential risks involved, but prioritizing safety and comfort should guide your choice.

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Troubleshooting Cruise Control Issues in 1991 Ford F-350