1993-1995 Isuzu Rodeo & Honda Passport Cruise Control Module: Why It's Rarely the Real Problem

Symptoms of a Failing Cruise Control System

When the cruise control stops working in a 1993-1995 Isuzu Rodeo or 1994-1995 Honda Passport, drivers may suspect the main computer module. However, a complete failure of the module itself is less common than other issues. More often, the problem lies with a switch, fuse, or vacuum line. Here are the common symptoms you might experience:

• Cruise control will not turn on: The indicator light on the dashboard switch may not illuminate, and the system is completely unresponsive. This often points to a blown fuse or a faulty brake pedal switch.
• Cruise control engages but won't hold speed: The system might try to set but then immediately disengages, or it may surge and fail to maintain a steady speed. This can be caused by a leaking vacuum hose or a faulty cruise control actuator.
• Cruise control works intermittently: The system works sometimes but not others, suggesting a loose electrical connection or a failing switch on the steering wheel or pedals.
• Cruise control won't disengage with the brake pedal: This is a critical safety issue, often caused by a faulty or misadjusted brake pedal switch.

In these vehicles, which are primarily OBD-I (On-Board Diagnostics version 1), a failing cruise control system will not typically illuminate the Check Engine Light or store a specific trouble code that can be read by a simple scanner.

Diagnosing the Real Problem First

More than 70% of cruise control problems are traced back to simple components, not the expensive electronic module. Before spending money on a replacement module, perform these checks:

1. Check the Fuses: The cruise control system has a dedicated fuse. A simple blown fuse is a common and very cheap fix. Consult your owner's manual for the correct fuse location in the interior fuse panel.
2. Inspect the Brake Pedal Switch: This is the most frequent culprit. This switch, located at the top of the brake pedal arm, tells the module to disengage. If it fails, the system may think the brakes are always being pressed and will refuse to engage. Sometimes, a small plastic or rubber stopper that presses the switch disintegrates with age, causing the switch to remain activated.
3. Check Vacuum Hoses: These older systems use engine vacuum to operate an actuator that pulls the throttle cable. Inspect all rubber vacuum lines running from the engine to the cruise control actuator (a small, round, black canister in the engine bay) for cracks, splits, or loose connections.
4. Test the Steering Wheel Switches: The buttons on your steering wheel can wear out over time. While less common, a failed "Set" or "Resume" button will prevent the system from working.
5. Verify the Vehicle Speed Sensor (VSS): If your speedometer is also acting erratically or has stopped working, the Vehicle Speed Sensor may be at fault. The cruise control module relies on the VSS signal to know how fast the vehicle is going.

Buying a Used Cruise Control Module

If you have ruled out all other possibilities and confirmed the module is faulty, a used OEM unit is an excellent, cost-effective option, especially since new aftermarket modules for these vehicles are generally not available. Here’s what to look for:

• Verify the Part Number: The most important step is to match the OEM part number exactly. The correct number for the 1994-1995 Honda Passport and 1993-1995 Isuzu Rodeo (with a specific production cutoff) is 8-97074-915-0 (Honda) or 8970749150 (Isuzu).
• Inspect the Connectors: Check for any signs of corrosion (green or white powder), bent pins, or cracks in the plastic connector housing. A module with clean, straight pins is essential.
• Look for Physical Damage: Avoid any modules with cracked cases, signs of water intrusion, or evidence of being opened or tampered with.
• Why Used OEM is a Good Choice: For an electronic part of this vintage, a recycled original equipment (OEM) module is often more reliable than a new, unproven aftermarket part. The OEM units were built to the manufacturer's quality standards for these specific vehicles.

Programming and Installation

Does this module need to be programmed?

No. The cruise control module for the 1993-1995 Isuzu Rodeo and 1994-1995 Honda Passport is a plug-and-play component. It does not need to be programmed, flashed, or coded to your vehicle's VIN. There is no immobilizer or anti-theft function linked to this module. You can simply swap the part and it will function correctly.

Replacement Overview

The cruise control module is typically located in the driver's side footwell, up under the dashboard. Replacement is straightforward for a DIY mechanic with basic tools.

1. Disconnect the negative battery terminal.
2. Locate the module under the driver's side of the dashboard.
3. Carefully disconnect the electrical connectors by pressing their release tabs.
4. Unbolt the module from its mounting bracket (typically 10mm bolts).
5. Install the replacement module, reconnect the electrical plugs, and re-attach the battery terminal.

Cost of Replacing a Cruise Control Module

The cost can vary significantly depending on the part source. Since the module is often not the problem, a diagnostic fee is a wise investment first.

Frequently Asked Questions (FAQ)