Dodge B3500 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Dodge B3500 and How to Fix Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
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25% chance it's the
Control Module
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25% chance it's the
Throttle
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20% chance it's
Something else
The most common reasons a Dodge B3500 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 Dodge B3500 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.

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.

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.

Troubleshooting Cruise Control Issues in a Dodge B3500

When troubleshooting cruise control issues in a Dodge B3500, it's essential to adopt a systematic diagnostic approach that begins with the simplest solutions before progressing to more complex problems. Start by checking the brake light switch connector under the dash, as a malfunction here can disrupt the cruise control system. If the brake light switch appears functional, inspect the throttle actuation components, as any issues in this area can prevent the cruise control from engaging. Additionally, examine the black plastic vacuum reservoir for any broken support legs, which can lead to a loss of vacuum necessary for the cruise control servo to operate effectively. Sometimes, the solution can be as simple as tapping the steering wheel near the cruise control switches, which may help re-establish a connection. If these basic checks do not resolve the issue, consider the possibility of a failed control module or sensor, which may require more in-depth diagnostics or professional assistance. By following this methodical approach, you can effectively identify and address the root cause of cruise control malfunctions in your Dodge B3500, enhancing your driving experience.

What Could Cause the Cruise Control to Malfunction in a Dodge B3500?

When dealing with cruise control malfunctions in a Dodge B3500, it's essential to understand the common problems that may arise. One of the primary culprits is a failed control module, which can disrupt the entire cruise control system. Additionally, issues with sensors or switches can lead to either complete failure or partial functionality, making it crucial to inspect these components thoroughly. Throttle actuation problems are another frequent cause, as they can prevent the cruise control from maintaining the desired speed. Furthermore, a broken cruise cable or a faulty servo can hinder the system's performance, requiring careful examination and potential replacement. Other factors to consider include a blown fuse, a defective brake pedal switch, and issues within the throttle control system. ABS problems and broken vacuum lines can also contribute to cruise control failures. By systematically diagnosing these areas, DIYers can effectively identify and resolve the underlying issues, restoring the cruise control functionality in their Dodge B3500.

Why is the Cruise Control Not Working in a Dodge B3500?

When the cruise control in your Dodge B3500 fails to operate, it’s crucial to address the issue promptly, as neglecting it can lead to safety risks and further vehicle damage. Common culprits include a malfunctioning control module, faulty sensors, or problematic switches, which can disrupt the system's functionality. Additionally, issues with throttle actuation or a broken vacuum line can prevent the cruise control from engaging properly. If you notice that the cruise control only works at certain speeds, this could indicate a deeper issue with the system's activation mechanism. Furthermore, a blown fuse or a defective brake pedal switch can also contribute to the malfunction. Ignoring these symptoms not only compromises your driving experience but can also lead to more significant repairs down the line. Therefore, conducting a thorough inspection or consulting a qualified mechanic is essential to ensure your vehicle remains safe and reliable on the road.

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Dodge B3500 Cruise Control Not Working: Causes & Solutions