1996-1999 Eclipse Power Window Motor: Fixing Slow, Stuck, or Noisy Windows

Symptoms of a Failing Window Motor

A failing power window motor in a 2G Eclipse rarely dies without warning. Look for these common symptoms that signal it's time for a replacement.

1. Slow or Stuttering Window Movement

One of the first signs of a dying motor is a noticeable change in speed. The window may struggle to go up, often moving much slower than it used to. This indicates the motor is getting weak and losing its torque. This can be caused by normal wear and tear on the motor's internal components, like the carbon brushes.

2. Grinding, Clicking, or Buzzing Noises

Unusual noises from inside the door when you press the switch are a major red flag. A grinding or clicking sound often means the gears inside the motor or on the regulator are stripped or damaged. A buzzing or humming noise without any window movement suggests the motor is receiving power but is seized or disconnected from the regulator.

3. Intermittent Operation

If the window works sometimes but not others, it can point to a few issues. It could be a failing motor with a dead spot, a loose electrical connection, or a faulty circuit breaker inside the motor that is overheating and resetting. Wiggling the wires in the door jamb while operating the switch can sometimes help pinpoint a wiring issue.

4. Window Drifts Down or is Crooked

If your window slowly creeps down on its own or appears crooked in its track, the problem is often a faulty regulator. However, a weak motor may not have enough strength to hold the heavy glass in the full 'up' position, contributing to this issue. Forum discussions on 2G Eclipses often point to issues with the regulator rails being bent or binding, which puts extra stress on the motor and can cause it to fail prematurely.

Diagnosing the Problem: Motor, Switch, or Regulator?

Before you buy a new motor, it's critical to confirm it's the actual cause of the problem. A dead window can also be caused by a bad fuse, a faulty switch, or a broken regulator. Follow these steps to diagnose the issue:

1. Check the Basics: First, check the main power window fuse. Also, press the window lock button on the driver's door control panel a few times; sometimes this switch can be the source of the problem.
2. Listen for a Sound: Have a helper press the window switch while you put your ear close to the door panel. If you hear a click or a humming sound, it means power is likely getting to the motor, but the motor itself is stuck or broken. If you hear nothing, the problem is more likely the switch or the wiring.
3. Test the Switch: The driver's side master switch is a common failure point. You can test it by swapping it with a known-good unit or by testing the contacts with a multimeter.
4. Test for Voltage: The definitive test involves removing the door panel and unplugging the motor's electrical connector. Use a multimeter to check for ~12V at the connector when the switch is pressed. If you have voltage, the switch and wiring are good, and the motor is the culprit. If you have no voltage, the problem lies upstream in the switch or wiring.

Buying a Used 1996-1999 Eclipse Power Window Motor

For a vehicle of this age, a quality used OEM window motor is often the most practical and cost-effective solution. New aftermarket parts can have issues with fitment, connector types, and motor strength, while a used OEM part is a guaranteed match.

What to Inspect Before Buying

• Check the Gear: Look closely at the main drive gear. Ensure the teeth are not stripped, chipped, or excessively worn.
• Inspect the Connector: Make sure the electrical connector and any pigtail wires are intact, free of corrosion, and not cut.
• Look for Water Damage: Check the motor housing for any signs of rust or water intrusion, which can cause premature failure.
• Confirm Compatibility: The driver's side (Left Hand) and passenger's side (Right Hand) motors are different parts and are not interchangeable. They are mirror images of each other. Verify you are buying the correct side for your car.

Cost Comparison

Prices for a power window motor for a 1996-1999 Mitsubishi Eclipse can vary significantly. Here is a general breakdown of what to expect:

Known Issues, Recalls, and TSBs

There are no specific recalls or Technical Service Bulletins (TSBs) from Mitsubishi directly related to the power window motors on the 1996-1999 Eclipse. However, NHTSA documents show investigations into power window switches on other Mitsubishi models from the era for causing smoke, but no formal recall was issued for the Eclipse. The most common 'known issue' reported by owners in forums is the failure of the window regulator, which often leads to the replacement of the motor at the same time. Binding regulators put immense strain on the motor, causing it to fail prematurely.

Frequently Asked Questions (FAQ)