1991 Dodge W150 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 1991 Dodge W150 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 1991 Dodge W150 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 W150 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-functional cruise control in a 1991 Dodge W150?

When diagnosing the non-functional cruise control in a 1991 Dodge W150, it's essential to adopt a systematic diagnostic approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the fuse associated with the cruise control system, as a blown fuse is a common and easily rectifiable problem. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can hinder engagement. Following this, check the vacuum lines, which are crucial in older models like the W150; any leaks or damage here can significantly impact functionality. If these initial checks do not reveal the issue, proceed to test the cruise control module, as a malfunctioning module could be the culprit. Lastly, verify the speed sensor's performance, since an unreliable speed sensor can prevent the cruise control from maintaining speed. By methodically working through these steps, you can effectively identify the root cause of the cruise control malfunction and take appropriate action to restore its functionality.

What are the common problems that could cause the cruise control to stop working in a 1991 Dodge W150?

When troubleshooting the cruise control system in a 1991 Dodge W150, it's essential to consider several common problems that could be causing the malfunction. Start by checking the fuse, as a blown fuse can disrupt the entire system and render it inoperable. If the fuse is intact, inspect the cruise control switch, since a faulty switch may prevent the system from engaging properly. Additionally, vacuum leaks can significantly impact the cruise control's performance, so examining the vacuum lines for any signs of wear or damage is crucial. The speed sensor also plays a vital role in maintaining the desired speed; if it's malfunctioning, the cruise control may not function correctly. Furthermore, issues with the brake light switch can interfere with the cruise control operation, as this switch is designed to disengage the system when the brakes are applied. Lastly, a defective cruise control module could be the root cause of the problem, so testing or replacing this component may be necessary. By systematically checking these potential issues, you can effectively diagnose and resolve the cruise control failure in your Dodge W150.

How urgent is it to repair the non-functioning cruise control in a 1991 Dodge W150?

When contemplating the urgency of repairing the non-functioning cruise control in your 1991 Dodge W150, it's essential to weigh both the convenience it offers and the potential implications of leaving it unattended. While the absence of cruise control may not pose an immediate safety risk, it can significantly detract from your driving comfort, especially during long journeys where maintaining a steady speed is beneficial. Moreover, neglecting this issue could lead to further complications, as the malfunction might be a symptom of deeper problems within the vehicle's throttle or electrical systems. Therefore, if you frequently rely on cruise control, prioritizing its repair can enhance your overall driving experience and prevent possible future repairs that could arise from underlying issues. Ultimately, while it may not be an urgent fix, addressing the cruise control malfunction sooner rather than later can contribute to a more enjoyable and stress-free driving experience.

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