Here's a breakdown of troubleshooting and potential fixes:
1. Check the Obvious:
* Wiper Arms: Ensure nothing is obstructing the wiper arms' movement. Debris, ice, or even a stuck wiper blade can prevent proper return.
* Wiper Linkage: Visually inspect the entire wiper linkage system. Look for any bent, broken, or disconnected parts. Pay close attention to the points where the wiper motor connects to the linkage arms. A loose connection or worn joint could be the culprit.
* Power: Make sure the wiper motor is receiving power. Check the fuse associated with the wipers (consult your owner's manual).
2. Troubleshooting the Wiper Motor:
* Access the Motor: This typically involves removing the cowl (the plastic cover over the engine compartment, often above the windshield wipers). Consult your repair manual for specific instructions on how to access the wiper motor in your 1997 Transport.
* Listen for Sounds: When you turn on the wipers, listen carefully. If you hear grinding or unusual noises, it indicates internal damage within the motor.
* Test the Motor (Advanced): If you have access to a multimeter and are comfortable with basic electrical work, you can test the motor's wiring to see if it's receiving the correct voltage and ground. (Be very careful working with car electrical systems.)
3. Possible Causes and Solutions:
* Worn-out Motor Gears: The most likely cause is worn or stripped gears inside the wiper motor. This is generally a sign that the motor needs replacement. Repairing the gears is usually not practical.
* Broken Linkage: A broken or disconnected part of the wiper linkage needs to be repaired or replaced. You'll need to identify the broken component and replace it.
* Park Switch: Some wiper systems have a parking switch within the motor that ensures it returns to the home position. If this switch is faulty, the motor won't park correctly. This is usually part of the wiper motor assembly and requires replacing the entire motor.
* Electrical Issues: While less common, a faulty wire, connector, or the wiper motor's internal electrical components could prevent proper function. This may require tracing the wiring harness and replacing damaged parts.
4. Repair or Replacement:
* Replacement: Replacing the entire wiper motor is often the easiest and most cost-effective solution, especially if the motor is showing signs of wear and tear or if the internal gears are stripped.
* Repair: Repairing the motor is possible but requires specialized knowledge and tools. Unless you have experience working on automotive electrical systems and mechanical parts, attempting a repair yourself is likely not advisable.
Recommendation:
* Consult a Repair Manual: A repair manual specific to your 1997 Transport is invaluable. It provides diagrams and instructions for accessing and working on the wiper system.
* Professional Mechanic: If you're not comfortable working on your car's electrical or mechanical systems, take it to a qualified mechanic. They have the tools and expertise to diagnose and fix the problem efficiently.
Remember safety first when working under the hood of your vehicle. Always disconnect the battery's negative terminal before starting any electrical work.
