1993 Chevrolet Caprice Cruise Control Isn't Working

Fixing Cruise Control Issues in 1993 Chevrolet Caprice

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Reviewed by
Devin Cabugcal
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 Chevrolet Caprice 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 Chevrolet Caprice 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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

What are the steps to diagnose the non-functional cruise control in a 1993 Chevrolet Caprice?

To effectively diagnose the non-functional cruise control in a 1993 Chevrolet Caprice, it's essential to adopt a systematic approach that begins with the simplest potential issues before progressing 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 problem. If the fuse is intact, inspect the cruise control module for any visible damage, as a malfunctioning module can disrupt the entire system. Next, test the cruise control switch to ensure it is operational; a faulty switch can prevent the system from engaging. Following this, examine the vacuum lines for any leaks or damage, as these are crucial for the proper functioning of the cruise control. Additionally, verify the speed sensor's functionality, since a malfunction here can also lead to cruise control failure. Finally, using a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. By following this structured diagnostic approach, you can efficiently identify and address the root cause of the cruise control malfunction in your Caprice.

What are the common problems that could cause the cruise control to stop working in a 1993 Chevrolet Caprice?

When troubleshooting cruise control issues in a 1993 Chevrolet Caprice, it's essential to consider several common problems that may be at play. One of the first things to check is the fuse associated with the cruise control system; a blown fuse can easily disrupt functionality, so inspecting and replacing it is a straightforward first step. If the fuse is intact, the next potential culprit could be the cruise control switch itself, which may need replacement if it's faulty. Additionally, vacuum leaks in the system can significantly hinder performance, so examining the vacuum lines for any signs of wear or damage is crucial. Another important component to inspect is the speed sensor; if it's malfunctioning, it can prevent the cruise control from engaging properly. Furthermore, issues with the brake light switch can also interfere with the system, so ensuring that this switch is operational is vital. Lastly, a misadjusted throttle cable can affect the cruise control's ability to maintain speed, so adjusting it to the correct specifications may be necessary. By systematically addressing these common issues, you can effectively troubleshoot and potentially restore the cruise control functionality in your Caprice.

How urgent is it to repair the non-functioning cruise control in a 1993 Chevrolet Caprice?

Repairing the non-functioning cruise control in a 1993 Chevrolet Caprice should be approached with a sense of urgency, primarily due to the safety implications it carries. A malfunctioning cruise control system can lead to distractions and increased fatigue during long drives, which may compromise your ability to react quickly in critical situations. Additionally, the convenience that cruise control offers, particularly on highways, enhances driving comfort and can significantly reduce driver strain on extended trips. Beyond immediate safety and comfort, neglecting this repair could also impact the vehicle's resale value. Prospective buyers often look for fully functional features, and a non-working cruise control could deter them or lower the car's market appeal. Therefore, while it may not be as critical as other mechanical failures, addressing the cruise control issue promptly is advisable to ensure a safe, comfortable, and valuable driving experience.

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