Windshield Wiper System
Whenever a windshield wiper or washer system malfunction occurs, disconnect the harness connections and clean the terminals. Ensure the wire harness is properly connected before starting diagnosis and repair procedures. For complete windshield wiper/washer schematics and diagrams, (Refer to ELECTRICAL/WIPERS/WASHERS - SCHEMATICS AND DIAGRAMS) .
Wiper System Diagnosis
| CONDITION | POSSIBLE CAUSES | CORRECTION |
|---|---|---|
| WIPER ARM(S) CHATTER ON WINDSHIELD. | 1. Permanent set of blade element edge. | 1. Inspect rubber element for permanent set. If not OK, replace rubber element. |
| 2. Bent or damaged blade structure. | 2. Inspect blade. If not OK, replace blade. | |
| - | 3. Bent or damaged arm. | 3. Inspect arm. If not OK, adjust blade to arm clearance. See procedure in this article. Reinspect, if not OK, replace arm. |
| DRIVER AND/OR PASSENGER ARM WILL NOT CYCLE (OPERATE). | 1. Loose arm to pivot shaft. | 1. Check arm to pivot shaft connection for looseness. Torque attachment nut to specification. |
| 2. Stripped arm to pivot shaft. | 2. Check arm to pivot shaft for stripping. Torque nut to specification. If not OK, replace arm, pivot shaft or both. | |
| DRIVER AND/OR PASSENGER ARM OR BLADE HITS COWL GRILLE OR WINDSHIELD MOLDINGS. | 1. Arm(s) out of position. | 1. Remove arm off pivot shaft, cycle module to park. Reposition arm/blade to location marks on windshield. Secure arm to pivot shaft and torque to specification. recheck wiper arm travel. |
| WIPER BLADE(S) STREAK. | 1. Contamination on blade element or windshield. | 1. Clean blade element edge with mild soap or alcohol and water. Clean windshield with mild soap or non-abrasive cleanser and water. Check for proper wipe quality. If not OK, replace blade element. |
| 2. Blade element damaged. | 2. Replace blade element. |