1. Check and Replace Wiper Blades: Before doing anything else, ensure your wiper blades are in good condition. Cracked, worn, or improperly fitted blades are the most common cause of poor wiping. Replace them if necessary. This is the simplest and often most effective solution.
2. Inspect the Wiper Arm Pivot: Make sure the wiper arm pivots freely on its connection point to the wiper motor. If it's stiff or binding, there might be corrosion or debris. Clean this area carefully and lubricate it with a silicone-based lubricant (not WD-40).
3. Adjust the Wiper Blade Position on the Arm (If Adjustable): Some wiper blades have a slight adjustment mechanism on the arm connection. This usually involves a small tab or lever that allows you to rotate the blade slightly. Experiment with this adjustment to see if it improves the wiping pattern.
4. Examine the Wiper Linkage: The wiper arm's connection to the linkage from the motor can sometimes become misaligned. This is less common and usually requires more disassembly to check and correct. If you suspect a linkage issue, this is best left to a professional mechanic. Improper adjustment here can cause damage to the wiper motor.
Important Note: Improperly adjusting the wiper linkage could damage the motor or other components. If you are not comfortable with this level of mechanical work, it's strongly recommended to take your Volvo 850 to a qualified mechanic or a Volvo specialist. They will have the correct tools and knowledge to diagnose and fix the problem efficiently and safely.
Before attempting any adjustments, consult your Volvo 850's owner's manual. It may contain specific information on wiper adjustment or maintenance procedures.
