1990 Dodge Ramcharger Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 1990 Dodge Ramcharger

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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 1990 Dodge Ramcharger 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 1990 Dodge Ramcharger 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.

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 steps to diagnose the cruise control issue in a 1990 Dodge Ramcharger?

When diagnosing a cruise control issue in a 1990 Dodge Ramcharger, it's essential to adopt a systematic approach that begins with the simplest potential problems before moving on to more complex diagnostics. Start by checking the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable issue. Next, inspect the wiring for any signs of damage or loose connections, as these can disrupt the electrical signals necessary for the system to function. After ensuring the wiring is intact, test the cruise control switch to confirm it is operational; a malfunctioning switch can prevent the system from engaging altogether. Additionally, examine the vacuum lines for any leaks or blockages, as these are critical for the cruise control's performance. The speed sensor also warrants attention; if it is not functioning correctly, it can hinder the system's ability to maintain speed. Finally, using a diagnostic scanner to check for error codes can provide insights into any underlying issues that may not be immediately apparent. By following this structured approach, you can effectively identify and address the root cause of the cruise control problem in your Dodge Ramcharger.

What are the common issues that could cause the cruise control to stop working in a 1990 Dodge Ramcharger?

When dealing with a malfunctioning cruise control system in a 1990 Dodge Ramcharger, it's crucial to understand the common problems that could be at play. One of the first things to check is the fuse; a blown fuse in the vehicle's fuse box can easily disrupt the cruise control functionality. If the fuse is intact, the next step is to inspect the cruise control switch located on the steering wheel, as a faulty switch can prevent the system from engaging. Additionally, vacuum leaks within the cruise control system can lead to a loss of functionality, so examining the vacuum lines for any signs of wear or damage is essential. Another critical component to consider is the speed sensor; if it malfunctions, the cruise control may fail to maintain the desired speed. Lastly, issues with the brake light switch can interfere with the cruise control's operation, as it is designed to disengage when the brakes are applied. By systematically checking these components, DIYers can effectively diagnose and address the cruise control issues in their Dodge Ramcharger.

How urgent is it to repair the non-functioning cruise control on a 1990 Dodge Ramcharger?

When contemplating the urgency of repairing the non-functioning cruise control on a 1990 Dodge Ramcharger, it's essential to weigh the potential consequences of neglecting this issue. While cruise control is primarily a convenience feature, its malfunction can lead to safety risks, such as unintended acceleration or deceleration, which could compromise your driving experience. Additionally, if you frequently embark on long journeys, the absence of a functioning cruise control system may result in increased driver fatigue, detracting from your overall comfort and enjoyment on the road. Furthermore, if you have plans to sell your vehicle in the future, a fully operational cruise control system can enhance its appeal and potentially increase its resale value. Therefore, while the repair may not be immediately critical, addressing the non-functioning cruise control sooner rather than later can contribute to a safer, more comfortable driving experience and help maintain the vehicle's overall value.

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