1993 Jeep Grand Cherokee Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 1993 Jeep Grand Cherokee 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 1993 Jeep Grand Cherokee 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 1993 Jeep Grand Cherokee 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.

What are the initial steps to diagnose the non-functional cruise control in a 1993 Jeep Grand Cherokee?

When diagnosing the non-functional cruise control in a 1993 Jeep Grand Cherokee, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the fuse associated with the cruise control system; a blown fuse can often be the simplest explanation for a malfunction. Next, examine the wiring for any signs of damage or loose connections, as these can disrupt the electrical flow necessary for the system to operate. After ensuring the wiring is intact, test the cruise control buttons on the steering wheel to confirm they are responsive. If the buttons are functioning, turn your attention to the vacuum lines, which play a critical role in the operation of the cruise control; any leaks or blockages here can prevent the system from engaging. Finally, if all these components check out, utilize a diagnostic scanner to look for error codes that may provide further insight into the issue. By following these steps, you can effectively narrow down the potential causes of the cruise control failure and take appropriate action to restore functionality.

What are the common problems that could cause the cruise control to stop working in a 1993 Jeep Grand Cherokee?

When dealing with a malfunctioning cruise control system in a 1993 Jeep Grand Cherokee, it's important to consider several common problems that could be at play. One of the first things to check is the fuse; a blown fuse can disrupt the entire system, preventing it from operating. Additionally, the brake pedal switch plays a crucial role in the functionality of cruise control; if this switch is faulty, it may not disengage the system when the brake is applied, leading to unexpected behavior. Another potential issue is vacuum leaks within the cruise control system, which can significantly impair its performance. Furthermore, a malfunctioning speed sensor can prevent the cruise control from maintaining the desired speed, while a defective cruise control module itself may also be the root cause of the problem. By systematically diagnosing these areas, DIYers can effectively identify and resolve the issues affecting their cruise control system, restoring functionality to their Jeep Grand Cherokee.

How urgent is it to repair the non-functioning cruise control in a 1993 Jeep Grand Cherokee?

When contemplating the urgency of repairing the non-functioning cruise control in your 1993 Jeep Grand Cherokee, it's essential to weigh the implications of leaving it unattended. While cruise control is primarily a convenience feature, its absence can lead to increased driver fatigue, especially on long journeys, which may compromise safety indirectly. Additionally, if you plan to sell your vehicle, having all systems operational, including cruise control, can enhance its appeal and potentially boost resale value. Furthermore, issues with the cruise control system might signal deeper electrical problems within the vehicle, making it prudent to investigate further. By addressing the repair, you not only improve your driving experience but also safeguard against potential complications that could arise from neglecting the issue. Therefore, while it may not be an immediate safety concern, taking action sooner rather than later can be beneficial for both your comfort and the longevity of your vehicle.

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