Ram ProMaster 1500 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Ram ProMaster 1500 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Ram ProMaster 1500 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 Ram ProMaster 1500 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 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.

Troubleshooting Cruise Control Issues in a Ram ProMaster 1500

When troubleshooting cruise control issues in your Ram ProMaster 1500, start with the simplest checks before moving on to more complex diagnostics. First, ensure that the cruise control system is activated and that you have set the speed limit correctly. If the cruise control indicator light does not illuminate when you attempt to engage the system, this could indicate a problem with the brake pedal sensor or the switch on the steering wheel. Next, inspect the throttle actuation system, as any issues here can prevent the cruise control from functioning properly. If these initial checks do not resolve the issue, consider examining the control module and associated sensors, as failures in these components are common culprits for cruise control malfunctions. By systematically addressing these potential problems, you can effectively diagnose and resolve cruise control issues in your vehicle.

Troubleshooting Cruise Control Issues in a Ram ProMaster 1500

When troubleshooting cruise control issues in a Ram ProMaster 1500, it's essential to understand the common problems that may arise within the system. A failed control module, malfunctioning sensors, or defective switches are frequent culprits that can prevent the cruise control from functioning properly. Additionally, throttle actuation problems can disrupt the system's ability to maintain speed. Another critical component to check is the brake pedal sensor; if this sensor is faulty, it may incorrectly signal the cruise control system to disengage. Before diving into repairs, ensure that the cruise control system is activated and that the speed limit is correctly set, as these simple oversights can often be the source of the issue. If the cruise control indicator light fails to illuminate when the button is pressed, this could indicate a deeper problem, such as a defective brake switch or speed control sensor. By systematically examining these components, you can effectively diagnose and resolve cruise control issues, ensuring a smoother driving experience in your Ram ProMaster 1500.

Why is the Cruise Control Not Working in a Ram ProMaster 1500?

When your cruise control isn't functioning in a Ram ProMaster 1500, it's crucial to address the issue promptly, as neglecting it can lead to safety risks and further complications. Common causes include failures in the control module, sensors, or switches, which can disrupt the system's operation. Additionally, throttle actuation problems may prevent the cruise control from engaging properly. A malfunctioning brake pedal sensor is another frequent culprit; if this sensor fails to detect when the brake is pressed, it can inadvertently disable the cruise control as a safety precaution. Warning lights on your dashboard, such as those for ABS or traction control, can also indicate underlying issues that may affect cruise control functionality. Ignoring these warning signs could not only compromise your driving experience but also lead to more significant repairs down the line. If you suspect problems with the steering wheel switch or the clockspring, it's advisable to consult a professional, especially considering the safety implications of working near airbags. For a thorough diagnosis, utilizing a diagnostic scan tool can help pinpoint the exact issue, ensuring that you can restore your cruise control system effectively and safely.

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Ram ProMaster 1500 Cruise Control Issues & Repair Costs