1995 Cadillac DeVille Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 1995 Cadillac DeVille 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
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 1995 Cadillac DeVille 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 1995 Cadillac DeVille 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.

What are the steps to diagnose the non-functioning cruise control in a 1995 Cadillac DeVille?

To effectively diagnose the non-functioning cruise control in a 1995 Cadillac DeVille, 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 straightforward fix that can often resolve the problem. Next, examine the cruise control module for any visible damage, which could indicate a malfunction. Following this, test the cruise control switch for continuity to ensure it is operational. It's also crucial to inspect the vacuum lines for leaks or damage, as these can significantly impact the system's performance. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, verify the functionality of the speed sensor, as a faulty sensor can prevent the cruise control from engaging. Lastly, ensure that the brake pedal switch is functioning correctly, as it is vital for disengaging the cruise control when the brakes are applied. By following this structured approach, you can efficiently identify and address the root cause of the cruise control malfunction in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 1995 Cadillac DeVille?

When dealing with a malfunctioning cruise control system in a 1995 Cadillac DeVille, it's essential to understand the common problems that may be at play. One of the primary culprits is often a failed control module, sensor, or switch, which can disrupt the entire system's functionality. Additionally, throttle actuation issues can prevent the cruise control from engaging properly, leading to frustration during drives. It's also crucial to check for a blown fuse or a defective brake pedal switch, as these components are frequently responsible for cruise control failures. Misadjustments in the brake pedal switch can cause the system to disengage unexpectedly, while faulty brake lights may signal deeper issues with the brake switch itself. Furthermore, problems within the throttle control system or the ABS can also interfere with cruise control operations. Lastly, if the check engine light is illuminated, it may indicate engine-related problems that could hinder the cruise control's performance. By systematically addressing these potential issues, DIYers can effectively troubleshoot and restore functionality to their vehicle's cruise control system.

How urgent is it to repair the non-functioning cruise control in a 1995 Cadillac DeVille?

When contemplating the urgency of repairing the non-functioning cruise control in a 1995 Cadillac DeVille, it's essential to recognize that while this feature enhances driving comfort, it does not compromise the vehicle's safety or basic functionality. The cruise control system is primarily a convenience, particularly beneficial during long drives, allowing for a more relaxed driving experience. However, neglecting this repair could lead to further complications down the line, such as potential electrical issues or the need for more extensive repairs if the underlying cause is not addressed. Therefore, while it may not be an immediate priority, it is advisable to schedule the repair at your convenience to ensure that your vehicle remains in optimal condition and to prevent any future inconveniences that could arise from a malfunctioning system.

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