1. Preparation:
* Park the van on a level surface and turn off the engine. Engage the parking brake.
* Locate the wiper arm nuts. These are usually located where the wiper arm connects to the wiper transmission. You might need a wrench or socket to remove them. The size is usually 9/16" or 10mm, but it could be different.
* Gather your tools: You'll likely need a socket wrench or adjustable wrench that fits the nut(s) securing the wiper arms, and possibly a flathead screwdriver (potentially to help pry a stubborn wiper arm if necessary). Have the new wiper blades ready.
2. Removing the Wiper Arms:
* Lift the wiper arm away from the windshield. It will likely have a curved shape; it's best to lift it up rather than pull it directly away.
* Locate the nut(s) holding the wiper arm to the transmission spindle. Unscrew them.
* Sometimes there's a small clip or retainer underneath the nut. You may need to pry this with a flathead screwdriver or release it by moving the arm slightly after loosening the nut.
* The wiper arm should now be able to be removed. If it's resistant, gently rock it back and forth. Avoid pulling too hard to prevent damage.
3. Installing the New Wiper Blades:
* Attach the new wiper blades to the wiper arms. The connection method varies by blade type. There are usually two primary types:
* Hook-type: The blade simply hooks onto the wiper arm's hook. Make sure the blade is securely attached before proceeding.
* Push-button/Pin-type: These require pushing a button or removing a pin in order to slide the blade on.
* Attach the wiper arm back onto the transmission spindle, making sure that the wiper arm is lined up correctly and the new wiper blade isn't interfering with its movement.
* Tighten the nut securely.
4. Testing:
* Turn on the ignition and test the wipers. Ensure they sweep across the entire windshield and that the arms do not rub against the windshield or hood.
Important Considerations:
* Wiper Arm Removal Resistance: If you're having trouble removing the wiper arms, be patient. Gently rocking the arm while loosening the nut is usually sufficient. Force can damage the wiper arm or the spindle. Applying a penetrating oil (like WD-40) to the spindle *might* help, but use it sparingly and be careful not to spray it on the windshield.
* Wiper Blade Size: Ensure you buy the correct size wiper blades for your 1991 Dodge Ram B250 conversion van. This information should be found on the old blades or in your owner's manual. Auto parts stores can also help determine the correct size.
If you are uncomfortable performing this task yourself, taking your van to a mechanic or auto parts store for replacement is always an option. They can do it quickly and correctly.
