1997-1999 Montero Column Switch: Solving Blinker, Wiper & Headlight Issues

Symptoms of a Failing Montero Column Switch

When the internal contacts or mechanical parts of the column switch wear out, you'll notice problems with the systems it controls. These issues often start intermittently before failing completely. Look for these common signs:

• Turn Signal Problems: The turn signals may not activate, may not cancel after a turn, or may flash erratically. This is one of the most common failures due to frequent use.
• Headlight Malfunctions: Your headlights might flicker, fail to turn on, or get stuck on either high or low beams.
• Erratic Windshield Wipers: The wipers may not turn on, may only work on one speed, or may stop in the middle of the windshield.
• Cruise Control Failure: If your Montero has cruise control, it may stop engaging or disengage unexpectedly.
• Multiple Systems Fail at Once: If your turn signals and wipers stop working at the same time, it strongly points to a faulty column switch assembly rather than separate issues.
• Buzzing Noise: Some owners have reported a buzzing noise coming from the switch area when trying to use a function, which can indicate failing electrical contacts.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

While there are no specific recalls from the National Highway Traffic Safety Administration (NHTSA) for the column switch itself on the 1997-1999 Montero, there are important related safety notices for this generation.

• NHTSA Campaign ID Number 20V035000: This critical recall addresses a faulty driver-side airbag inflator in 1998-2000 Montero models. The inflator can rupture during deployment, causing serious injury. Since replacing the column switch requires removing the airbag, it is essential to verify if this recall has been performed on your vehicle. An authorized Mitsubishi dealer must perform this repair free of charge.
• Other Recalls: Other recalls for this period include issues with front brake lines chafing (NHTSA 98V220000) and interference from accessory cargo mats with the third-row seat latch (NHTSA 98V205000).

No specific Technical Service Bulletins (TSBs) related to widespread column switch failure on this model were found during research.

Buying a Used 1997-1999 Montero Column Switch

A used OEM column switch is an excellent, cost-effective alternative to expensive new parts or unreliable aftermarket units. Here’s what to look for to ensure you get a quality part.

Confirming Compatibility: The Headlamp Washer Question

The most critical factor when buying a column switch for a 1997-1999 Montero is verifying whether your vehicle is equipped with headlamp washers. These are small nozzles on the front bumper that spray washer fluid on the headlights. The column switch contains the control for this function, so the parts are not interchangeable.

• MR277908: This is the OEM part number for vehicles WITHOUT headlamp washers. This version still includes cruise control functionality.
• MR277911: This is the OEM part number for vehicles WITH headlamp washers.

What to Inspect on a Used Switch

• Physical Condition: Check for cracks in the plastic housing or stalks. Ensure all the white lettering and icons are clear and not worn away.
• Stalk Action: Move the turn signal and wiper stalks through all their positions. They should click into place firmly and feel solid, not loose or sloppy.
• Electrical Connectors: Inspect the connector ports for any signs of corrosion (green or white powder), melted plastic, or bent pins. Clean connectors are a good sign of a healthy part.
• Wiring Harness: Make sure the pigtail wires (if included) are not cut, frayed, or damaged.

Why Choose a Used OEM Switch?

Original Equipment Manufacturer (OEM) parts are made by Mitsubishi or their supplier to the exact factory specifications. A used OEM switch offers superior fit, feel, and electrical performance compared to many new aftermarket parts. Aftermarket switches can suffer from cheaper materials, leading to a loose feel, incorrect wiring, and premature failure, forcing you to do the job twice.

Replacement Guide

Replacing the column switch is an intermediate-level job that requires careful handling of the airbag system.

Step-by-Step Overview

1. Disconnect Battery: Loosen the nut on the negative battery terminal and remove the cable.
2. Remove Airbag: On these models, there are access holes on the sides of the steering wheel. Using a screwdriver, you can release the springs holding the airbag module. Carefully unplug the electrical connectors and set the airbag aside in a safe place, face up.
3. Remove Steering Wheel: With the wheels pointing straight, remove the large center nut holding the steering wheel. Mark the position of the wheel relative to the steering shaft before pulling it off to ensure correct alignment upon reinstallation.
4. Remove Column Shrouds: Unscrew the upper and lower plastic covers around the steering column.
5. Remove the Switch: Unplug the electrical connectors from the column switch assembly. Remove the screws that secure the switch to the column and pull the entire assembly off.
6. Installation: Installation is the reverse of removal. Install the new switch, reconnect the wiring, re-attach the column covers, steering wheel, and airbag. Reconnect the battery and test all functions (wipers, lights, turn signals) to ensure proper operation.

Frequently Asked Questions (FAQ)