1992 Cadillac Eldorado Cruise Control Isn't Working

Fixing Cruise Control Issues in 1992 Cadillac Eldorado

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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 1992 Cadillac Eldorado 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 1992 Cadillac Eldorado 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 initial diagnostic steps to troubleshoot the non-functioning cruise control in a 1992 Cadillac Eldorado?

When troubleshooting the non-functioning cruise control in a 1992 Cadillac Eldorado, it's essential to adopt a systematic diagnostic approach. Start by checking the fuses related to the cruise control system, as a blown fuse can often be the simplest explanation for the malfunction. Next, inspect the brake pedal and throttle body; any issues here can directly affect the cruise control's operation. It's also crucial to verify the vehicle speed sensor circuit, as a malfunction in this area can prevent the cruise control from engaging. Consulting the vehicle manual will guide you to the fuse box location in the engine bay, allowing you to inspect the specific fuse for the cruise control. Lastly, examine the brake pedal/light switch, as a faulty switch can disrupt the communication necessary for the cruise control to function properly. By following these steps, you can effectively diagnose and potentially resolve the cruise control issues in your Cadillac Eldorado.

What are the common problems that could cause the cruise control to stop working in a 1992 Cadillac Eldorado?

When troubleshooting the cruise control system in a 1992 Cadillac Eldorado, it's essential to consider several common problems that could be at play. One of the primary culprits is a failed control module, which can disrupt the entire system's functionality. Additionally, issues with sensors or switches may prevent the cruise control from engaging properly. Throttle actuation problems are another frequent cause, as they can hinder the system's ability to maintain speed. It's also important to inspect the vacuum actuator and its associated hoses, as damage or leaks can lead to a complete failure of the cruise control system. Furthermore, the cable connecting the actuator to other components should be examined for any signs of wear or damage. On a simpler note, a blown fuse or minor electrical issues can also be responsible for cruise control malfunctions. Lastly, keep an eye out for defective switches or sensors, as well as any warning lights on the dashboard, such as the "check engine" light, which may indicate underlying problems. By systematically checking these areas, you can effectively diagnose and address the issues affecting the cruise control in your Cadillac Eldorado.

How urgent is it to repair the non-functioning cruise control on a 1992 Cadillac Eldorado?

When considering the urgency of repairing the non-functioning cruise control on a 1992 Cadillac Eldorado, it's essential to evaluate the underlying causes and their implications. A blown fuse, while a common and easily fixable issue, can often be addressed at your convenience without immediate concern. However, if the malfunction stems from a faulty brake light or brake switch, the urgency increases significantly. These components are vital for safe driving, as they ensure that the cruise control disengages when the brakes are applied. Ignoring such issues could lead to dangerous driving situations. Additionally, if the cruise control failure is linked to a check engine light or other engine-related problems, it is crucial to act swiftly. These issues not only affect the cruise control system but could also lead to more severe engine damage if left unresolved. Therefore, while some repairs may be less pressing, prioritizing those that impact safety and vehicle integrity is essential for the overall functionality and safety of your Cadillac Eldorado.

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