1991 Dodge B250 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 1991 Dodge B250 and How to Fix Them

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Reviewed by
Bo Fader
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 Dodge B250 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 Dodge B250 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 steps to diagnose the non-functioning cruise control in a 1991 Dodge B250?

To effectively diagnose the non-functioning cruise control in your 1991 Dodge B250, start with a methodical approach that emphasizes simplicity and accessibility. Begin by checking the fuse associated with the cruise control system, as a blown fuse is a common and easily rectifiable issue. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational; malfunctioning buttons can often be the culprit behind a non-responsive system. Following this, examine the vacuum lines, which are critical in older vehicles like the B250, for any signs of leaks or damage that could disrupt the system's functionality. Additionally, verify the speed sensor's performance, as it is essential for providing accurate speed readings necessary for cruise control operation. Finally, consider using a diagnostic scanner to check for any error codes that may indicate specific problems within the cruise control system. By following these steps, you can systematically identify and address the issues affecting your cruise control, making the troubleshooting process more manageable and effective.

What are the common problems that could cause the cruise control to stop working in a 1991 Dodge B250?

When troubleshooting the cruise control system in a 1991 Dodge B250, it's essential to consider several 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, examine the cruise control switch itself, as a malfunctioning switch can prevent the system from engaging. If these components are functioning correctly, turn your attention to the vacuum lines; any leaks can significantly impact the cruise control's operation, so identifying and repairing these leaks is crucial. Additionally, the speed sensor plays a vital role in the system's functionality, and ensuring it is in good working condition can help restore cruise control. Lastly, don't overlook the brake light switch, as a faulty switch can interrupt the cruise control system's operation. By systematically addressing these potential issues, you can effectively troubleshoot and potentially resolve the cruise control problems in your Dodge B250.

How urgent is it to address the malfunctioning cruise control in a 1991 Dodge B250, considering potential safety risks and further vehicle damage?

Addressing the malfunctioning cruise control in a 1991 Dodge B250 is of utmost importance due to the significant safety risks it poses. A malfunctioning system can lead to unintended acceleration or deceleration, which can compromise the driver's control over the vehicle, especially in high-speed situations like highway driving. This loss of control not only endangers the driver and passengers but also puts other road users at risk. Furthermore, neglecting this issue can lead to more severe problems, including potential damage to the engine or other critical components, resulting in costly repairs down the line. Therefore, it is crucial to diagnose and repair the cruise control system promptly to ensure the vehicle operates safely and efficiently, maintaining both performance and peace of mind on the road.

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