Pontiac 12399988 Insert, Windshield Wiper

Removal of the wiper arms requires the use of special tool, GM J-8966 or equivalent pry tool. Lift the wiper arm from the window, then insert the tool under the wiper arm. Lever the arm off the transmission drive shaft. Use care not to damage the paint on the vehicle. Remove the wiper blade from the arm. To install, install the wiper blade onto the arm, position the wiper arm on the wiper motor drive shaft so that the blade assembly rests in the proper park position, and press down on the wiper arm until it is fully seated on the drive shaft. The same special tool for removal can be used for installation.

Raise the hood and lift the wiper blade off the glass, disconnecting the wiper arm locking retainer from the wiper transmission shaft by prying out the lock. Pull the arm off the transmission shaft, ensuring that when installing the arm, the windshield wiper blade assembly release lever faces the base of the arm assembly for proper alignment with the glass contours. Align the right wiper arm assembly in the parked position and attach it to the transmission shaft, confirming that it is correctly positioned before installation. If the wiper arms and blades were correctly positioned before removal, no adjustment is necessary; otherwise, to adjust the left wiper arm, loosen and raise the left side of the cowl vent screen and loosen the rear wiper link-to-motor crank arm attaching nuts without removing them. Rotate the right arm assembly to a position 3/4-inch below the ramp stops and tighten the attaching nuts on the rear wiper link(s)-to-motor crank arm to 4 to 6 ft lbs. Place the left arm and blade assembly next to the spindle, aligning the slot in the arm with the keyway in the spindle, then push the arm down and place the blade on the ramp stop on the vent screen. Lift the right arm and blade assemblies over the stop, wet the windshield, and check the wiper pattern and parked position, ensuring the distance between the top of the wiper pattern and the left edge of the windshield is 1 to 2 inches, with an overlap of approximately 1 inch at the blade tips. To adjust the right arm, remove it from the driveshaft, determining the correct park position and wiper pattern dimensions with the wipers operating at low speed on a wet windshield, and finally, reinstall the cowl vent assembly.

Insert the tool or a screwdriver under the wiper arm and pry the arm off the shaft, being careful not to scratch the paint. Disconnect the washer hose from the arm (if so equipped) and remove the arm.

For the first type blade, press down on blade and release spring. For the second type blade, depress the press-type release lever and slide off the wiper arm pin. For the third type blade, insert a screwdriver under spring and push downward on screwdriver to raise spring.

Cracked, broken, or torn elements should be replaced immediately.

G.M. J-8966 or equivalent, which is generally available in auto parts stores.

The first step is to lift the wiper arm off.

The windshield wiper and blade assembly should be inspected for damage, loose components, and cracked or worn blade elements.

To remove the old wiper blade element, depress the blade-to-arm connector, slide the blade assembly off the wiper arm and over the retaining stud, use needle-nose pliers to push in and pull out the two metal clip, then slide the old element out.

After installing the new wiper blade element, compare it with the old one for length, design, etc. Then, slide the new element into place, reinstall the blade assembly on the arm, wet the windshield or rear window, and check for proper operation.

To remove the wiper arm/blade assembly, you need to pull it away from the windshield glass while counteracting the tension of the wiper arm spring.

In the other type of windshield wiper assembly, the blades park in a depressed position against a step on the windshield lower molding.

First, remove the attaching screws and pull out the knob. Then, disconnect the wiring and remove the switch.

Use tape on the windshield to mark the exact location of the wiper arm.

The rubber element can be replaced by either depressing the press-type button and sliding the old element off, or by pinching the spring-type retainer clip together to slide out the old element.

Road film can build up on the wiper blades and affect their efficiency.

If the wiper blade elements are cracked, worn, or warped, they should be replaced with new ones.